Condos don't care about Visa. You probably can do Visa Exempt a couple of times. Then I'd suggest getting a multi-entry e-visa (tourist visa). I was doing similar for a couple of years. No problems. Now have DTV for longer stays. I think the trick was going back to the USA, versus a neighboring country. And staying in the USA a couple of months before returning to Thailand.
Best Answer. Getting snippy with airport personnel serves no purpose. Yes, they aren't immigration officers, but they can call the immigration officers. Just smile and say thanks and move on.
That costs probably included the costs for Muay Thai classes or something. The only cost for DTV is $400 USD. But yes you will have additional costs for classes, if going that route.