I appreciate your vision and  risk considering the picture 

Also Brandon Turners book, the Book on Real Estate Investing, has so much information that covers many various ways one can take, or how to combo investing opportunities.

They'll have so much more knowledge about houses, a lot less drama.... the other girl is brand new, and would likely struggle with bills, and may move for a better paying job-- whereas grandma has other people to help cover the bills...  

See if insurance will cover any of the costs.2.

There are a lot of potential risks, however, the good deals are good enough to cover the bad ones. 

I don’t want to drive people away but I want to cover my costs.

If anyone knows of an article that already covers these details or a podcast episode, feel free to share and I will check those out.

It's an interesting article about HOA's and COA's - might be worth a call to the law firm to ask about your rights and if your legal fees can be covered if you win.

You can charge a deposit - it's not as essential as a standard rental where a tenant can trash the place without your knowledge - but a smaller deposit to cover damage won't scare a room-renter off. 

If maintenance is covered in your cash flow reserves but you really like doing things like this it's never too late to start learning the handyman skillset.