She didn't comply with it. 

Your buildings will have to comply with extra regulations and overall you may have to run things as more of a business than you are used to.

Hopefully you complied with Texas law if the lease purchase agreement was for more than 180 days. 

A lot of STR owners are turning to Monthly / Corporate Housing Rentals as this allows them to capitalize on increased rental rates while complying with local laws. 

What I initially thought would be simple turned into a complex issue that took me a couple of hours to research.Most State statutes are available online...run a search for "lien" within your State's online legal reference to make sure you are complying with the law before filing a lien against someone's property.

When they become a listing agent for a seller they make sure all laws are complied with.

Research the laws in your state frontwards and backwards so you can be sure to not just comply but also to ensure no ethics complaints.

You also need to know if the seller has been doing other deals as you may need to go to a mortgage originator to comply with new laws.

.- Comply with all legal requirements, since your business if run from R-1 is still a subject to zoning, city codes, insurance, permits, licensing, liabilities, taxes etc.  

All this goes double for condos, as the condo community has to comply with various criteria (% of owner occupants, # of owners in default on there monthly HOA fees, financial reserves of HOA).