Or would it have to stay in Texas to keep the protection of a Series LLC?

I would stay well clear of providing services to tenants.

Having that flexibility allows me to earn more as I can accept a 2-3 night stay to fill in gaps where needed.

I do stay away from airbnb because I have found I get a better quality of a renter from sites like VRBO.com and CHBO....but again AirBnB might be just perfect for you in addition to other sites. 

Instead get a no trespass warrant taken out against her to stay off of your property and when she violates the warrant have her arrested.

While I don't believe tech will be the end to residential realtors, I do think that whatever you do, it would be wise to adopt and learn new relevant RE technologies along the way to stay ahead of the game. 

They'll probably stay a few years or longer,probably won't trash the house when they leave, maybe you hire a prop manager and outside of an emergency you don't do that much.

VA loan is awesome however I personally feel as though home prices and rentals are ridiculous and unless you're throwing down a decent downpayment or staying here long term, it's not worth it.

Any thoughts or rule of thumb when upgrading your primary and still stay on investment goals?

When you do stay in house for few hours to make sure no leaks.