Question about Mining

Hello
This is my first post and would like to say hello to everyone, so hears my question I have look at so many pages and post and have come to the conclusion nobody really knows but I think most here know better than me because I have never done mining before other than renting an L3+ on ebay for 12 hours just to see how it works on NiceHash and I made about $20 but my question is if I pre-order an L3+ from Bitmain for Dec 1-10 for $1970 with PSU and S&H do you think I will still make money through 2018? With it, I have found calculators buy thy seem to stop 7 days in the future!! I know as hash rates increase these will make less but what about all the other coins that can be mined with scrypt I plan on using nicehash and really just wont the money more than coins, I thought about building a GPU rig but that seems very costly with the price of 1080TI cards also I have tried to find out if there is any newer tech on the horizon that would out perform the L3+ but nothing seems legit, should I wait for new tech or is the L3+ still a good money maker through 2018 any insight or help would be much apprehended.
Thanks very much,
Jeff.