When I ask "Professor Google" about this it says C4D is NOT illegal in TX, just strictly regulated.

Definitely follow the regulations in the area and if permissible I would offer to attempt to find an acceptable tenant and terminate their lease when that happens but in the meantime they will need to continue to pay.

membership is something like APPL which is just non regulated group of private investors working on best practices but there is no authority behind them like  state license or NMLS registration has ..

There isn't a sustainability problem in Texas, it's a regulation problem.

Just be sure to check local regulations because some spots are cracking down on STRs.

All of this said, be sure to do your research on STR regulations first and find a STR friendly location.

Can regulations change?

I saw an example recently in Bloomberg about how local regulations can really shape a landlord’s experience, from what I’ve heard.

One last comment about the regulators: the SEC will do nothing to a syndicator with a failed project, so long as he/she shows that they did not do anything blatantly or willfully illegal and were merely incompetent failed syndicators.

To get started - I’d recommend connecting with local STR investors and researching Hawaii’s regulations.