Since netnoy and Bdrm have already listed why this is a terrible idea, I will simply tell you some stories of my past experiences when allowing an SB to move in with me. TLDR: None of these ends well for me.
Stripper I converted to an SB: She was cute, spunky, sexy AF, and more helpless than a puppy when I met her. She was living in a cheap motel a block from the club and the creepy motel manager was constantly hitting on her for sex in lieu of rent. We connected in the VIP room and I became a regular, seeing her 1-2x a week. Now admittedly, this was back in my White Knight days, and I was a card-carrying Simp. I decided to "rescue" her from the evil manager and had her move into my apartment with me. We had sex there exactly one time. Then it all slid downhill... She was a slob. She smoked (in my non-smoking unit). She broke my stuff - a lot. She almost ignored me - until she needed cash. But hey, I was helping her, right? And any day now she will show me how grateful she is by sliding onto my cock, right? Yeah... WRONG! She would leave my place when I got home from work and return after work - or so I thought. In fact, she had quit the club and was slipping out to go see (and fuck) some guy she was "in love" with. It turns out she had followed (i.e.: Stalked) him from New York and was hoping he would someday realize she was more than a fuck doll for his casual amusement. I'm sure you can guess that he had no intentions besides fucking her, and all on my dime! By this time, the apartment building manager started coming to me with complaints from other tenants. Lots of them. I had to kick her out and it did not go well. Overall, I spent 10 weeks and about $3k in total futility.
Black 4'11" spinner in San Jose. Met her on Seeking. She offered BCD on at our M&G and never asked for allowance. I gave her $250 and we agreed to meet on the regular. She lived in a rented shack in someone's back yard. It was an unpleasant place. The sex was off the charts. She was a total freak in bed and I was hooked. After a few weeks she told me her landlord was kicking her out and she could not afford to rent anywhere else. I figured I had a perfect set up in front of me. Bring her to live at my place, cover her living expenses and some spendy cash and I have 24/7 pussy on call. This was the start of a nightmarish 6-month trip through hell. I started noticing empty booze bottles in the back of closets, cabinets and in the bathtub. Then she started disappearing randomly for a day or more - only to return at 3:00 am without her keys. And rather than knock on the door to get me, she would (twice) break a window to get inside. I had to sit her down for "the talk." That's when she told me she was bipolar. She went on to tell me that she could not stand her bipolar meds and chose to self-medicate with booze. So there I was with a bipolar alcoholic SB roommate. I tried to be an understanding nice guy. We talked about how I could help her, about how I needed her to stop the destructive behavior. It didn't better, but I felt that she was trying. Then one day I came home from work early and found her fucking her Alcohol Anonymous sponsor on my sofa. I gave her 2 days to get her stuff out and she left with the guy. Three days later I told her to get all her stuff in 48 hours, or I would trash all of it. 49 hours later I filled the trash bin and had the leasing company change the locks. There's a lot more to this story, but you get the point.
Finally, an observation: If you invite an SB to live with you, you will effectively lose the freedom to go BCD with anyone else. Sure, you can meet other SB's at a hotel or their place. But your roommate will be fully aware of what you are doing because she freaken lives with you. She will know your schedule, your habits, your routines, including what you do before you head out to bang a chick. In addition, she will have access to EVERYTHING you have; PC's, clothes and possessions, files, pictures, and any other secrets you have. Do not expect that she won't go digging into your shit while you are away.
I guess I'll sum up with this thought: We don't date SB's because we want to find a life partner. We date SB's specifically because we can leave at any time without incurring legal fees or life changing negative consequences.
I always say that "All arrangements end." This is not a bug, it's a feature! It's a really bad idea to enter an arrangement that is excessively difficult and expensive to end.
Life is good
The Cat