Hello everyone!

I just got two quick questions.
I wanna buy GPUs for mining altcoins. Not a specific altcoin, though, I want it to change the altcoin it mines depending on it's proffitability.
I generally look at Bitmain's Antminers and from there use calculators to see which is the best to buy.
As soon as I enter the site, I see a few tabs such as SHA256 (which I know is an encryption algorythm, though I don't know exactly how it works), scrypt (which idk what it is), X11 (same as before) and CryptoNight (same as before) among others.
I guess each tab refers to a different algorythm each GPU is designed for. And then, those algorythms are compatible with some crypto currencies (SHA256 with BTC, Scrypt with LiteCoin among many others).

Now the problem begins when I use proffitability calculators. I'm using Antminer L3++ as example. 580 MH/s, 940W, and  the power cost were I want to mine (Denmark) is around .3 €/kWh but I want to be a bit pessimistic so that when I mine in real life I get a good surprise, so I use .33 USD/kWh.

When I use these data in coinwarz.com checking only the scrypt checkbox, I get -5USD proffitability per day for litecoin (after paying power).
When I use cryptocompare.com and the same data for litecoin, I get about 150USD proffit per day after paying electricity. For pool fees I use 1% as a standard value as I yet haven't chosen any pool, though I'm sure the pool I use has to have proffit switching.

Now the questions: Why do different calculators give different results? Are they even trustworthy?
And where can I find mining GPUs other than Antminers? And when I find a good one, how do I know if it is suitable for mining a coin or another?

Now for this kind of plan; switching between the most proffitable coins to mine, what GPUs do you recommend me to buy? I can spend up to around 10k € +/- 1k€

I'm ure I'm going to make a small investment to test mining, wether I continue mining or do another thing depends on, as you said, my effort, experience and -luck- .

Thank you all for taking your time to answer my questions and help this noob here. Have a nice day, wherever you are!

Does that mean that if 1GPU makes 2.3$, 2GPUs would make 4.6$?
Cause that's very interesting

Thanks a lot for all of that useful information and links, I checked them all out before replying (even the youtube chanels) and saved them.
Thank you, I hope I learn a lot, and of course, I hope I make some money too!

Okay, what if I buy a simple 300$ GPU, try to learn and if it's not worth it, I invest all the money into buying the currency directly, if else, I invest into mining.
Is it a good plan?

Hey, thank you! I was using coinwarz.com to calculate but that one looks a lot better.
I used the products that bitmain sells to calculate this, and apparently it says that the proffitability is a lot (for what the product costs), but htere's something I want to know. Is that "proffitability" parameter measured in months or in days? I guess there is somewhere on the internet where to learn how to use that calculator.
Thank you very much for sharing that with me!!

Wow.... wait a sec, I repeated the calculation with a different product from the same site, and even though it is a lot more expensive, it isn't proffitable at all (it costs more energy that the coins it produces...). I'm repeating this calculation with the most expensive one in the site.

Okay so depending on the product, the proffit can range between -2.73 to 186 $
Again, I'm not sure about what time period they are using (I don't know if it's -2.7, 2.7 and 186 $ a month or a day).
What I thought is I could save money (I will want to invest in around a year from now) and research prices and products for around one/two weeks before investing to predict what would the best option be. I just came up with an idea; but different types of miners, and depending on each type's proffitability, use some GPU's or others, and mine some cryptocoins or others.

What do you think? Is it a good idea?

Thank you for replying so quickly!

1.- Would you rather mine or invest into crypto directly?

2.- Do you recomend me to mine bitcoin or is it even harder to make money trying to mine bitcnoin? (I focused my "research" on altcoins, so I have no idea of the technical difficulties of bitcoins)

3.- About the last and penultimate answers; Is it impossible to make money mining altcoins or just very unlikely? Cause, what I understood with that last answer is it might be possible to make money (what I want is for it to make me any money. If it repays the investment sooner or later is of less importance for me, for me having invested 10k dollars and not making money but loosing it even more is a full defeat while making little money and repaying initial investment in two years is only partial defeat, partial victory)

Though if I just buy a 200/300€ GPU and it turns out not to be proffitable it wouldn't be such a bad thing cause I guess I could use that GPU for gaming (always optimistic)

First off, I want to mine in a country from europe, and I think it is illegal to mine cryptocoins in certain countries. Where can I know if it is illegal to mine in the country I want to go to?

Second question is, I want to save around 10k dollars, probably more, to start building a mining rig. I just want to know, is it proffitable? Will I get my investment back faster if I invest more money or if I invest less? And, of course, is it proffitable? In the sense that, can it generate enough money to pay it's own energy consumption, internet usage and the space I'm planning to rent, while also giving some extra income?

Also, before going all out with this, I first want to test with like a cheap GPU, like aroung 200€ plus any other necessary equipment, to get some experience and familiarize myself with the software and needs.
Assuming a 400€ "test" investment, would that generate money worth it's own comsumed energy and internet broadband while at the same time generating an income, a beneffit? You know, I don't want to waste my money. I'm okay with taking risks, but a 0% chance isn't a risk, so if it's impossible I need to know before investing anything.

Also, one last question, do you recommend me any books to learn about this? Or any formulas I can use to calculate proffit based on GPU's speciffications? I'm good at maths and I'm okay with investigating some hundred hours of formulas and current price of cryptocoins. I want to go serious with this, and I didn't know who to ask.

Also, if you know a better place to ask, please tell me. I think there is a subreddit and a stackexchange about cryptocurrency?

Thank you in advance for all of your answers and for taking your time to help me, hope you have a nice day!