My sister's ex-boyfriend's dad had a wine basement, although it wasn't really a basement, just a climate-controlled separate room near the pool. We actually drank a lot of the wine from it at my sister's college graduation. The boyfriend would open a bottle, mention that it was really expensive and older than we were and it was going to reach peak drinkability in another two years, and then add that his dad was going to kill him. Then he'd open another bottle. Not the most responsible guy. Anyway, over the long term, a climate-controlled room is probably not too much more expensive than keeping your house cool all the time.
I should add that I keep my house warm all the time, though. I'm always cold.
And I like to have quiet during the day. No tvs on. I rarely even play music. I have to remind myself to do it for the children.
I understand what heaven it is to have a perfectly served meal that is absolutely delicious.