Serious Body Rust Below Driver's Side

I've had my car for 35 years. In that time it's had it's passenger door caved in, a big rig clip the drivers front fender, 3rd car in a 5 car pile up, and the last was a deer running out in front of me sending the car into a hillside. I've put it back together everytime. Many of my friends thought I should just junk it. I say if you've got the time and the patients anything is fixable.