The other option would be to man up and tell your wife who wears the pants...
Here in Michigan, my basement gets too cold in winter to keep the carboys down there so I had to tell my old lady they were sitting on the bathroom counter wrapped in the towel whether she liked it or not. I'm man enough to say I don't usually win, but she didn't fight me too much... I just explained my other options were going to get expensive and I really needed her to support my one hobby.
From what I have heard/read... the temp is most crucial for the first part of fermentation. That is when you get a majority of the esters, etc from the yeast. So even if you just got one, you could control the youngest beer. If the temp gets a little low later on a beer that is fermented out and is just getting some bulk aging, you should be ok.