If they insist on staying, then they abide by the contract, period.Tenants threaten to sue all the time.

You could choose to let your mother stay in the property rent-free.

You will also need to vet out contractors in the area to ensure you that they can stay on top of your project and will do what they say.

@Allende Hernandez what happens if one or more occupants move out and the others stay?

She can use that money to get a hotel room or short term rental....or stay with family or friends.

Tenants prefer detached housing over attached housing and stay longer. 

Now some stayed with me and that was great but some learned that with a little bit of knowledge you can do it on your own.  

I just stayed in a hotel in Moab and we had an A/C issue and it took two days to resolve and, honestly, that's not that out of line with my normal experience at hotels.I don't know where people dreamed up this idea that all hotels have someone waiting outside your room ready to resolve anything in 5 minutes. 

I'd rent first to be sure I'm going to stay. 105 degrees to 115 is normal May to October in Scottsdale and no Puget Sound 

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