If you are moving to escape CA., TX will soon go blue.....matter of time. All of the big cities in Tx are run by Democrats now.....they are a lost cause. This includes San Antonio. I guess anything is possible but my understanding is you can't transfer here. As has been said, you'll have to quit. So, what do you have to lose? I guess everything at UPS up to this point(including top pay). If you had feeder experience, probably get hired right away but then you would have to go through progression. San Antonio seems to have a lot of gang stuff also. Lot of racial tension, especially between blacks and hispanics.
Expect TX to look like CA in the next 10-20 years. I would actually look at TN. if you are conservative although I hear Nashville and Memphis are as liberal as it gets and as screwed up(crime, racial problems) as any liberal city.
If you can move to anywhere, why not look around to other long term places. You sound young.
If you think politics won't matter......you are naive. In my rural area(40 miles from a medium city) most homes are going for about $350,000. Starter homes about $200,000.