[az] My Stepmom Wants To Sell My Dad And Her Dad's Joint-owned Home Because She And My Dad Are Breaking Up, What Can We Do To Prevent This?

Throwaway account. Sort of long post ahead, sorry about that. Lots to go over.

My (18M, 19 in a few days) dad(40s) and I live out in the country, about an hour-ish from the nearest town. He's lived here since about 2018, while I moved in with him about a year ago after leaving my other parent's house (can't go into details, but it was a bad environment for me to stay long-term due to violent nonverbal autistic younger brothers, and I am also autistic so it's difficult for me to get and keep a job that pays well enough for me to live on my own).

My stepmom Emily(40s) (not her real name, not actually married to my dad, she doesn't believe in marriage) has been dating my dad for 9 years, and she lives in the city (about a 4 hour drive from our country house) with her dad (I'm going to call him Josh). She comes here maybe every 1-2 months, for about a week at a time. Josh comes here for maybe a week every 3-6 months.

Josh and my dad have joint ownership of the property. My dad is a carpenter, and has been doing work trade with Emily and Josh to fix up the house. For context, when they bought it, it was falling apart, and being foreclosed on, so they got it for cheap. Somewhere around 50k, I think. Josh paid for it, and put both my dad's and his name on the property.

For about 6 years now, my dad has been constantly working on the property instead of taking more outside work while Emily and Josh pay for groceries and lumber/construction things. They started having a rough patch in their relationship about 2 years ago, though, because my grandma developed dementia and he had to start taking care of her while working on the property, and she needed a lot of attention. A little less than a year ago she also passed, and he was grieving for a few months and wasn't able to be as cheerful or helpful. He was still doing work during this time, though. They just started arguing more.

Anyway, about 4 months ago my dad was driving to town to do some smaller work for another person and got hit by a teenager who was on her phone while driving. It heavily injured his back, and surgery to fix it isn't an option because he can't go under anesthesia without his heart stopping, so he's been effectively disabled and can't do carpenter work anymore. Mentioning this because it affects what he can do for income, since he's been a carpenter his whole life. I should also mention the settlement will likely be in his favor, since the teenager admitted to being on her phone and causing the accident, and he's hoping to get around 200k (the number his lawyer gave him), but it looks like the court battle with the insurance is going to take over a year, so the settlement wont be anytime soon.

Emily and my dad have been on and off for a while now, but since my dad hasn't been able to work at all anymore and hasn't been bringing in any money, Emily has been supporting him financially more since she does freelance tattoo work. She's been upset at him though and she told him that he was just a financial drain on her the other day, which is why my dad has decided to end the relationship for real this time.

Gonna get a bit personal, but she came up to the country for my birthday, and they ended up having this argument because of that, and her not liking being up here because she can't work up here. This morning, she called Josh on the phone (on speaker) outside of my room (my room is right by the kitchen cause of how the house is built. my dad knows about this happening and came and apologized for me having to hear it later) and started talking about wanting to sell the house with Josh, and Josh said both sides could probably get 150k out of it if they decide to split, but I'm concerned because 150k and no income probably isn't enough to buy a house and live off of until the settlement in today's market. Not to mention, neither Josh or Emily live up here, and my dad has put hundreds if not thousands of hours of work into the place, and we've been living here while they haven't. We can probably get a trailer or something if we really need to, so we won't be homeless, but I'm just wondering if there's anything else we can do, or some way we can keep the property instead of being forced to sell, since it's our home and my dad has put a lot of work into it. I'm really attached to it.

Also, I don't think Josh would be cruel enough to try to sell without consulting us*my dad or splitting, but just in case, is there anything we can do if he does? I know money wise he's put stuff into it too, and he has rights to it, but we've been living here while he's only really treated it like a mini vacation home of sorts.

Sorry if this post isn't written well, or has unnecessary info, I don't really understand legal stuff that well so I just put in everything I thought might be relevant. Also, I'm kind of just trying to work through my feelings about this happening right before my birthday by writing out what happened and asking what I can do. I'm really stressed and don't want to lose our home. If anyone has any advice that'd be great. If anyone has any questions also feel free to ask and I'll answer as best as I can