I'm (27f) not sure i can keep being in a relationship with my husband (29m) because of multiple issues

So my husband and i have been together for something like 6 years now. Without going into too much detail about our relationship, i had to move across the planet to be with him, it's been a good relationship for the first 2-3 years. After that things started to unravel that i wasn't necessarily aware of.

The main thing that really bothers me is his mental state. He CLEARLY needs mental health attention but he just can't get any. We live in a place that makes it exceptionally hard to get mental health care on a budget, free care is available but the waiting lists are years long. From this stem more and more issues. He can't work. He has tried but he just can't, and i don't blame him for it, he is a really broken man, but in the mean time we are stuck in limbo with him only getting a small government check every month and me not being able to work because of other reasons (won't go into it but it's not related to my health, it's the location) and i can't get my citizenship because he clearly can't sponsor me on his tiny subsidy check.

The other thing is his mother. Before i met my husband, his mother let him live in one of the apartments in the house that she owns. Where i come from, it's normal for families to live together in a family house, or even in apartments. It's not like in America where kids are expected to get out of their parents house and go buy their own place. So i was under the impression that him living there wasn't a burden, but turns out she kept holding it against him and kept waiting for him to "get on his feet" and start paying her rent. She's a nice lady and pretty generous, but she is not without her own issues. We do anything and everything for her, whenever she wants, whatever she wants. Essentially, because she gives us a roof over out heads, she has the right to command us around all she wants and let her frustrations from work or whatever out on us. Lately she's been particularly aggressive about the smallest things and in the past 2 or so years there's been this lingering feeling that she hates us and wants us gone, and so she is constantly passive aggressive with us, but whenever we brought up getting out of her hair she would revert and be nice to us for a while. It's hard to explain how i feel right now, it just feels like maybe she thinks i'm a horrible freeloader and am just munching off of her family, she would NEVER say that to my face or even hint at anything like that, i don't know if i'm being paranoid or what, but i just feel very unwanted here.

Lastly, i just really really miss my family back home. I just know that they would never treat me like this, and it makes it very hard for me not to want to just bail on all of this and go home. I haven't been able to speak to them for the past month because any time i think about them i just break down in tears and i don't have the balls to share how i feel with them. I just don't want them to worry or think that i've made a huge mistake by moving away. But i do care about my husband, for all of his flaws and mental issues, he's a good guy and he has told me that he is very afraid of losing me and it just breaks my heart. I feel like i have no future here, i got caught in this depression vortex and everything has just been going worse and worse. I just don't know anymore. Also, i'm not saying i'm a saint or anything, i have my own flaws, but they just don't seem to be in the same league as this family's issues.

Sorry this is so.. not cohesive.. English is not my first language, but this has been particularly hard to write, my mind is just all over the place. I just really wanted to vent somewhere since i can't really tell this to anyone i know.

tl;dr: Husband stuck with mental health problems, can't work, sometimes can't even function. His mother is helpful with material things, but holds everything against us and is constantly mentally abusive to him. I'm caught in the middle and have no idea what to do, i love my husband, hate the situation we are in, future seems bleak.