So I've seen a few(many) posts regarding people getting their mining equipment months, sometimes a year after they ordered it, by which then the difficulty to mine Bitcoin has already increased, rendering their bought mining rig useless. So, can someone please explain how much of a profit do they make off mining Bitcoin? How much did your rig/asics cost? How much Bitcoins do you make a day average? Is it possible to mine solo instead of in a pool and how much would it cost to do it efficiently?
Xdigital had it right, there are calculators that will tell you when you will pay off your investment in hardware. I make a 90% profit return on mining after paying fixed expenses (power, etc). Mining equipment varied in price over time, from $5k to as little as $500 depending on when it was purchased. Focus on pooled mining, I don't know anyone who mines solo anymore.