Wow....there are many concerns there....Rust is like cancer. You can battle forever and then never get it all. I agree with Ferdman that you should probably investigate replacing doors to make sure you get it all. How are the door sills?
Headlamp washers are expensive - I had to replace the motor on one of mine and the part was $500!
You have some meaningful fixes there....but you have come to the right place for help!