I was interested in building a btc mining farm, a solar-powered one. It seems to be the future of mining. Unfortunately I can't find enough information about the price of it, but by the models that I see, it looks expensive.
It doesn't only look expensive, but building up a decent home level farm is indeed an expensive investment where you constantly need to invest into your farm due to the difficulty going higher and higher.
If you don't keep adding extra gear from time to time, then you'll fall behind significantly where you'll have a hard time even getting 75% of your initial investment amount back.
What is your budget if I may ask? And at what hardware have you been looking? What country you're from?