55yr incontinent mother living on the couch of my 3 bedroom duplex I share with my two teens.

I’ve been on this forum a lot in the past few weeks and it’s to the point where I just need to ask for myself. I’m 36 single mom to two teens, my mother has been living on my couch currently but has been with us for ten long years. To explain how I got myself into this situation, I just want to start by saying my childhood and upbringing were very difficult which doesn’t help and I’m trying really hard not to ramble. I’ve typed and backspaced 100 times already Ten years ago when my kids were both in elementary, my son’s father died and I was going through a difficult breakup with an alcoholic. I have a good job at a factory working early mornings, at first I was paying family to come hang out at my house weird early hours so my kids wouldn’t be home alone although they were sleeping. My mom and I never got along but after inconsistence with other baby sitters I offered her to live in my 4th bedroom I had at the time. I exhausted all other options, my two brothers couldn’t be bothered to help bc they feel, as well as my mom, I ruined my life by having kids. This wasn’t a easy decision but felt I would have lost my decent job. It might not have been as bad if it stayed that way but about 7 years ago, due to other complications with my duplex we had to downsize to a 3bdrm, so she’s been living in my living room. She’s always been neglectful, negative and mean spirited to herself and her kids. I suspect some kind of mental illness, but she’s been diagnosed over the years with sever type 2 diabetes which has caused her to be incontinent and as of recently she has a permanent brace on one foot so she can’t walk as well anymore. It’s kind of a relief she can’t get around as much bc now I have more of my small duplex to myself again, but she makes everything tense. Me and my kids are always in our rooms, my house smells like diarrhea and cigarettes bc she smokes on my porch and the smoke just trails in with her. She gets medical from the state but that’s it so far, I’m hesitant about applying for other benefits for her bc I don’t want her to live her permanently and she’s not on my lease so I don’t want to put my address on any documents. Here’s where I need advice and where I’m riddled with guilt, now one of my brothers lives in town the other 3 hours out, in town brother has a house but 7 step kids the out of town brother lives alone, big house no relationship. They don’t see a problem with my arrangement but if push came to shove I think the out of town brother would step in. I’ve considered recently, bc we got a new landlord, writing a letter looking like it’s from my landlord threatening to evict me if I’m subleasing my mother, so I could set her up with him and avoid any family conflict as in, it’s out of my hands. I would need to do it soon, before the holidays, that would mean a adjust in the morning for my teens, my mom does help make sure they’re up and does dishes etc if she can but nothing I’m not willing to adjust to. I feel if my landlord actually knew he would do the same thing so I don’t want actually involve him, and I know it isn’t going to go well with my mother. Even though she’ll have her own room, won’t have to deal with kids and finally have space it’s far from her comfort zone and doctors she just finally started seeing 5 years ago. I think my brother would set her up with doctors where he lives but I’m not positive. I’m rambling again but I’m so stressed, depressed and overwhelmed. I have two jobs, I resent my mother for not raising me and in turn making me raise her all the while criticizing me and my two kids. I desperately need a change but feel guilty and anxious bc I know it isn’t going to go over well. Should I type my landlord letter? I fear a heart to heart with my brother about how I’m feeling won’t be enough bc he doesn’t exactly want her to live with him either but I can’t handle it anymore