how bad is bad ?

That door latch stud is the easy part of the project; the rest is very rough and in my opinion beyond fixing because you will never come close to getting your money back out of the project.

That aside, and by luck you hit the power ball this week becoming a member of the more money than brains club, Leno is president by the way, have at it… LOL

Seriously you would be thousands and thousands of bucks ahead if you purchased a fully restored car, instead of fixing that rusted heap. I suspect you can recoup your investment plus a few bucks ahead by parting it out.