@Theresa Harris what advice do you have to get them to leave if they won’t take cash for keys?

I work for the State of CA in all of there property Acquisitions, it is a very common method to pass on the right of Survivorship without probate. 1/3 Mother in law ; 1/3 You; 1/3 Your SpouseThis would account for any deaths in the family and pass right to the surviving owners. 

@Theresa Harris i love the charging them as an Airbnb guest!

@Jourdain Francine yes, just like @Theresa Harris said you can spell it out in the lease upon renewal. 

@Theresa Harris I should mention that since the birth of their new baby they have: 2 parents, 1 teenager, 3 kids under 3 yrs all living in a 2bd/1ba duplex.

Yes, but you need to narrow it down a lot to have a coherent answer.You will have to look at (I'd recommend in this order) the city codes (if it's inside a city, many cities above 50-100k population aren't friendly to development of these), the county codes (most counties are friendly to these, but you will probably have significant issues in major counties like Bexar, Travis, Dallas, Denton, Tarrant, Harris, etc), then you will have to comply with the state-level (TCEQ and others) on the water supply and waste water treatment systems.To put it in perspective again, in say Dallas or Austin, you will likely have prohibitions or very significant hurdles on developing RV or tiny home properties even on unincorporated, "unrestricted," AG-zoned properties at both the city/municipal level and county level.

@Theresa Harris @Stephanie P. thank you both for your responses! 

You can try setting one up at BMO Harris maybe if you have nearby or Chase.

Grocery stores not only survived but thrived.

@Theresa Harris@Theresa HarrisI am good at day to day property operations, I find ways to increase the efficiency of property systems such as boilers,HVAC, energy consumption, water consumption, I make sure the systems will last longer,I make sure the occupants in the building are safe.Basically maintenace, preventive maintenance,repairs, managing tenants,collecting rents (even though its not my job,I do it), I make recommendations to the landlord on how to save money without sacrificing the comfort of tenants and I do my best to avoid defferred maintenance.My father does construction (20+ years,he operates a small construction business) maybe I can put him on my teamThank you for answering