A Renter perhaps or am I staying

It looks like I have a renter for my house. Every day, I waffle on what to do with this place. I don't want to sell it but I don't want to live in it because I could save so much more living with my mom. But what to do with it in the meantime. Well, sadly a buddy from work has just broken up with his partner of 11 years and is looking for a place. The upside is he knows every thing that is wrong because we have already talked about it. Also he knows that I have been working hard on fixing things up since I have owned it. He knows I bought a new hot water tank last year etc. So he knows what he is getting into. He drove by the other day and liked the outside. We just have to coordinate schedules and do the walk-through.

But there is a problem. My mom. I love her to death, don't get me wrong but she was part of the reason why I moved out in the first place. She can't help herself from re-arranging stuff that doesn't belong to her. She can't stop poking her nose in places that it doesn't belong. If I am paying rent then I am paying for the right to put stuff where I want it. Not so. She was a firm believer in that whole my roof-my house argument. I thought that had changed, she has lightened up quite a bit in her old age but today I was made plainly aware that perhaps nothing has changed.

I don't have a vaccuum, just a Roomba. And it is great because I only have carpet upstairs but my mom feels the Roomba doesn't do a good job and comes with her vacuum to clean my carpets every once in a while. Whatever, I don't care. Well my Roomba is dead, so I welcomed her and her vacuum this afternoon. The problem was a couple of times she asked me if I wanted to do A or B. Both times I said no, I don't want that. Both times she completely disregarded what I wanted to do what she wanted. I feel like she either doesn't hear me or she does and she just doesn't care. I actually think it is one or the other depending on the situation.

So we parted and we were both upset. I called her later to make sure she got home ok because she hadn't called me yet and I tried to rationally explain how I felt. I was hoping she would say that she was sorry that she wasn't respecting my wishes in my house and that she would work on that. Instead she got mad and said she was never coming with her vacuum again. Knowing my mom the way I do, I bet right now she is stewing about how ungrateful I am and thinking that she is never coming back to this house period. Her reaction makes me think that if I moved back home, it would only be a short period of time before I was resenting her and was miserable like I was as a child. The only problem would be that I had to wait a year to get back into my house because I had rented it out to someone else.

What to do? And why I am I so bad at making decisions?