I can at least weigh in on Texas... I agree with the assessment that, for a retiree, cost of living is less that average (92.5) since restaurants, labor / services, and housing are cheaper than US average. I also agree Texas would not be considered tax friendly. Although there is no state tax, property taxes can be insanely high and sales tax is high (6.25 base rate, 8.25% in many cities). Average utility bill is also higher than US average. Although we have a deregulated electric market, studies have shown that this has increased the cost to consumers (and it's also intentionally confusing and overwhelming when you evaluate the offerings). Not to mention the freeze last year and now associated costs are being passed on to consumers.
There is no column taking in to account the benefit of mild winters and access to beaches, diverse cities to choose from, good in-state universities, relatively good transportation options (international airports, decent highway system, etc.).
I have plans in ER to keep a foothold in Texas for the winters and international travel hub, and to be near family, but I would love to find a summertime getaway (Wyoming, Utah, Montana maybe?)...