You might try taking out a Craigslist add and offering an amount of money for the job that you want done. It can take several days labor to insulate and panel a van. Nothing in a van is square, straight, or level. Just about every cut needs a pattern made to do it. Several more days for electrical work, (install batteries,solar panels, inverters, chargers, lighting circuits, fuse boxes, run wires, etc. , and then several more days to build beds and cabinets. When I built out my van I thought a couple of weeks ought to get it done. It was more like a couple of months working on it when I could, (and I am retired).
Most people want to get paid for their time and effort. They know how to clean a house, but don't go around cleaning houses for free to help the old or disabled. They somehow feel that others should work for them either for free or dirt cheap. For a couple of hundred you can buy a Ryobi power tool kit and a ruler and watch Youtube videos to learn how to use them. How much money would you work a week or month for? How much money do you think a skilled craftsman should work a week or month for?
The other option is go basic at first. A good sleeping bag, a cot, cooler, camp stove, water jugs, some plastic storage boxes, a bucket complete with plastic bags and toilet paper. The money you save not paying rent can go to paying a craftsman. Good luck.