You have to look at your situation 2 ways. First from a monetary point of view saying what is the house worth, what does it need and what will it be worth. That’s the way a house flipper would look at it trying to make money and at worst breaking even.
Then you have to look at it as a person who also needs a place to live for you and your family. If you sell the house take a loss or break even you still have the burden of finding another place and starting the process over with all new unknowns.
If it is not profitable for you to fix things and stay above the water then it will also be a tough sale finding someone else that will want to try and do the same thing. You have the advantage of combining your housing costs into the big picture. That is good and bad as you also have the aggravations of trying to live and enjoy a home with all the problems.
I have kind of lived this same way on and off most of my life and when I sometimes had the time I didn’t have the money and when I had the money didn’t have the time. Looking at a bunch of problems as a whole just makes the whole thing seem insurmountable I get that. I know so many people that feel that same way.
You now have a place to live that I’m assuming has heat, is dry and is basically sound shelter. This might sound strange knowing all that needs done but if I were you I would pick one room in the chaos maybe your bedroom, and something you could handle the work yourself and make it really nice. Give yourself a spot to enjoy and regroup between all the other stuff.
It also seems all this is falling on you to accomplish and you have others more able but less willing to get things done. When I was 12 my dad had me painting the house and doing the yard work and anything else he could think of where I wouldn’t kill myself. There should be help from others benefiting from a roof over their heads.
Pick one thing after you have your personal retreat done maybe the laundry and make it a DIY project. You said you have water out there already even if you need to make longer hoses to get the water where you need it I would do it. If there is not a drain line out there I would make a hole in the wall and run it out to the yard behind. Half the people around here have their wash water watering the grass. It might not be kosher but it will get you by. Then there is the 240V power. Its not out of the realm of DIY to do this with the help of the guys here, but if not you can do some of it and hire someone to do the connections. No way should it be 4k to make a stab at getting it moved where you want it maybe $400.
Don’t give up. When we were redoing this place Holly’s granddad at 86 years old was helping. He is an old codger that has built a few houses in his day and mostly liked to boss me around, that I needed. He would say almost after every little change we made “Every little bit helps”.