"in places like Texas or Florida it's required to have functioning AC by law, depending on where you're at"
I couldn't find evidence that this is true. Can you point me to that requirement?
This must be a recent change since I grew up in Florida in a house w/o air conditioning. (Easier in a Florida cracker style home than one designed around A/C.) My Dad would have been pissed if there were the law 20 years ago. Of course, even if we had A/C he wouldn't use it - the house was only slightly more insulated than a tent.
There is a Florida law which says landlords must provide heat during winter. From http://www.flsenate.gov/Laws/Statutes/2012/Chapter83/All :
> Unless otherwise agreed in writing, in addition to the requirements of subsection (1), the landlord of a dwelling unit other than a single-family home or duplex shall, at all times during the tenancy, make reasonable provisions for ... Functioning facilities for heat during winter, running water, and hot water.
In any case, this only applies towards rental properties.