I like your choice. It looks like a great rig, but some of the things that you have to consider is summer heat in Austin and how well it is insulated. Keeping a tin can cool in summer might be a big issue. Check the walls and make sure the rig isn't just a can. Does it have a place for a TV? I didn't see one. And you really should look at one with a slide to get you more side space. 6 inches makes a big difference.
Another thing you can do is to go to a couple of RV Parks and talk to other folks in the area. Go on a Saturday when folks are around. Ask question, ask about their rigs and what they like about it. Ask if there is a propane delivery service that comes to the park or will you have to take your tanks to be refilled. If you only use propane to cook with it isn't much of an issue but in winter it will be your heat source. Another thing to ask is do they pay electricity or are you responsible for it.
And I agree with the others, go look at used rigs for about 15,000 and see how much more bang you can get for your buck. We bought an awesome TT repo last year for under 6k and its is has its own bedroom. Needed cleaning and fixing but hubby is handy. You really want to look for one with a bedroom, a slide or two and as much space as you can afford.
I just read that the RV industry has started to boom again and my feeling is that the reason is many folks are looking at RV living full time for the same reason that you mentioned.