Well, luckily the electricity is very cheap here(~0.04$), with space and heat I have trouble too. The "server room" is actualy a 0.8m by 2m closet. For now is great because is winter and is around 10 degrees C. Another big plus is wife support:D. By this summer we will move to our new home and there I will have a proper server room with AC and all. When I reach the goal, I will open it for visitors.