My apartment has terrible electric panel and wont support more than 2 tanks. Of course window AC and my little home theater draw alot of juice too. I may need to add a couple of breakers if I want to add more tanks.
If I had the space the problem would be choosing what type of set up to do. I would love to do a reef tank, Discus tank, emersed planted riparium, cichlid tank, shrimp tank and many others. Too many ideas not enough space or electricity!
Right now the two big tanks are on a buffet in the living room and the 5g is on the kitchen counter. If my husband hadn't put the smack down on my MTS I could move my daughter's 20g to her dresser and be able to have at least another 20g in its place on the buffet. I could also move her play kitchen to the other side of the living room to make way for a 55g. I could also have a 10g on my kitchen counter on the other side of the sink from the 5g and another 10-20 or bigger on a counter in my mudroom. I could probably also fit another 37g or two 20g on the dresser in my bedroom.
Even though we have a two-story house, we live downstairs and use the 2nd floor as storage so conceivably I could have probably around 700 sq ft to turn into fish rooms. But my husband would shoot me.