It's all about tradeoffs when choosing a place to live.
Good weather all year often means hotter weather in summer. Arkansas is less polluted than the Dallas Metroplex but certainly has heat & humidity in summer - and quite a lot of rain, sub-freezing days and chance of ice in winter.
Housing costs are certainly lower than Plano, but medical care would almost certainly be less accessible, and ranks lower in most rating systems.
It is wonderful that you like to do research, so you can study all the features that are important to you. For example, taxes are fairly low in both states, but Texas has a far better road system, more update infrastructure like water, sewer, etc... And access for your family via airlines is more difficult in Arkansas than Texas...

We have decided that as long as we are able, we will divide out time between Texas (for the winter weather, area history & activities and our large group of friends) and Minnesota (for proximity to family, access to medical care and better services for aging people) This matches the pattern chosen by 3 generations of my family - with a fourth looking to follow us when they retire.
Do you or your husband have ties to any area you might like to revisit?
Sue

Sue

Yes I know it’s awful in the summers there I literally can’t stand to go outside if I’m ever there in hot summer Arkansas is the same . So far I haven’t had many health problems that my doctors can’t take care I’ve only had one surgery and that was a hip replacement but it wasn’t to bad took about 2 months for me to get completely well I hate to start all over finding Doctors if I move there