you're either working for free or not going to do a great job at those prices. I'd double or triple that guesstimate, you might still be low. Unibody construction, you're building this vehicle from the ground up if you're replacing what needs to be replaced. You'll more than likely find inner structure damage if the floors and rockers, fenders are rusted. I would run from this job unless you just don't have anything to do for the next 6 months.
"When I was younger, I could remember anything, whether it had happened or not." - Mark Twain