hot AND humid area then they may ?need? the cooling system more
Yes good point, when it gets too humid we head south. Humidity is a real pain.
leave your domicile less often and purchase in bulk. Many people going 'off the grid' don't stockpile food that goes bad so quickly.
We try to buy every 2-3 months and can easily live that long without hitting the shops although the choices are a bit slim after a while and there's obviously no fresh stuff left.
a fridge isn't really required
I'll have to disagree most strongly there, where would I put my beer? 
Rob