daunting as you might think it is. To pay a mechanic to do it definitely not worth it for that car, but depending on the make/model, a junkyard motor could be had on the cheap.
Maybe, if you're able, even consider buying him the motor as a little mercy help, and his contribution is the work to install it.
I get a lot of people think that is old-fashioned thinking, but you could have a good time together, he can learn a few things, and maybe use the experience in a sacrament talk one day 🙂
It's not always about the dollar and cents. Experiences and lessons have value as well.