This is by far the best post I have seen today
You've turned a con of mining into a pro, every miner is always complaining about the heat, and the $ needed to cool off the room so that the rigs won't have a problem, I can see that's is not your case!
The only downside, is the Electricity bill, if you are only thinking about warming your place with your actual pc's/rigs, you should just keep going, but if you are looking to get more money, you should buy a couple more rigs, and some solar panels.
Anywho, great post. Upvote, and going to follow you now :)