I have to respectfully disagree with you.
Weather - I'm assuming you are in Texas, then you know... right now it's 101 and that is a normal occurrence during the summer, which is from June to sometimes (excuse my language) "freakin'" October. And then we do get that freezing weather, which is just as bad. (I'm still traumatized from the "big freeze".) The only good times to go without people fainting would be in the spring.
Infrastructure - Plus, you said in between Dallas and San Antonio. Does that mean the Austin area? Have you been on I-35 lately?
And, not that this is any comparison, but we do have Fiesta Texas, Six Flags, and Schlitterbaun.
However, I've heard the rumors over the years about a possible build here, but I doubt it would ever happen. My husband thinks it would be awesome to be honest, but I disagree. The main reason for me is that it just wouldn't be the same! I don't think it would be nearly as good as Disney World. I don't think the cast members would be as nice as the Florida crew either. I'd still keep going to Florida!