It is not that I am “comfortable” with a big range it is just that if I am too poor to KEEP it at 40 degrees I can tolerate it up to about 70 (if the humidity stays low) so if I can get down to that and it takes a long time to get back up to that, I save electricity.
That would be way too hot for my fridge. milk spoils way too fast for me at 40 degrees.
I try and keep it at around 33 degrees.
Ice cold milk is a Mechiaya that can’t be beat 🙂
If on Shabbos I need several fans going even according to you 4 fans would be like two light bulbs going and everyone I know worries about making sure even one bulb does not stay on longer then necessary.
Places I eat for shabbos often have bulbs on timers going off before the meal ends and we have to bentsch in the semi darkness.
If I had the money I would make my place like walk in fridge, i’d also have a horse ranch with thousands of acres and a large swimming pool.
In my present place I do not have control over the electricity and I do not have even a single dedicated line just for my use.