That is actually one of my plan. I have a close friend who also have free electricity and we are thinking to buy rigs to mine different coins, like btc. However, we are not yet experts on it, so we are buying more time to study and get to know more all about mining. We dont want our investment go to waste. Rigs are very expensive investment, no need to be greedy.
I'd start with GPU mining, ASIC machines are hot, noisy and have more chance to break. Also with free electricity consider buying old gpus like radeon390 they are cheap and hot but performance is good