The best BTC mining rig for $1000 is the one that you don't buy.
Lol ☺
believe or not, this is what I learned here and it take me couple of years. You know it now. enjoy:)
I would agree it's getting harder and harder. But I would not say year's. I have done pretty well with decent electricity and selling gear.
This generation has a big jump in difficulty multiple times. So will be interesting value of BTC in a few months. I really hope we get a few good bumps in value.