You will need a licensed TX attorney to oversee the legal documents, you need escrow officers and transaction managers and business development/marketing.

I own a commercial building where I use half of the building for my team and the other half is office spaces rented to businesses.

Jeez, I would have dropped the biggest hammer I could find right on her.I get scammers are an issue but she is not the police of STRs.

They said it is usually faster but someone that handles it was out of the office.

@Najeh Davenport  Start with the local zoning office. 

He rented the stores for office use, like a travel agency, and the other to a video store, when a barber shop of many years closed up.

As we have 100+ year old trees on the property, as well as a pond and year round stream, I think it could also be used for a tiny-home or tiny-office (commercial) community, which would allow me to maintain control of my property long term and providing recurring revenue to me (my company). 

The bottom floor is approved for commercial business and has the main vault, some marble flooring, and a back room office and restroom.

Both times I have contacted the police, and filed a complaint, and nothing ever happened. 

In Metro Detroit area, police will not remove these types of occupants (they are afraid of scamming landlord having police remove legal tenants), calling them a "civil matter" forcing landlord to start court eviction process.