Restorations on a car in the condition of yours will be very expensive When you consider all of the work that will be needed. Consider the costs of an engine rebuild, complete interior (dash pad, gauges, seats, headliner, lower door panels, shift lever, carpet, wiring harness, etc.) For a good example, here is a link to my car.
http://www.musclecarrestorations.com/ga ... TX-71-000/
When the car was disassembled, the rust issues we expected weren't as bad as originally thought. Obviously the lower quarters need to be repaired, but if all of the rust is below the lower break, a good metal fab shop can replace the metal without having to buy full quarters if you can even find them. Until the aftermarket actually repops the quarters, this will probably be your biggest obstacle. You also need to ask yourself what you are going to do with the car. Do you want to drive it regularly, show it, etc. I also would use a reputable shop that is familiar with Mopars. There are many shops that are good, but I would ask for references and speak to people who have gone through this before jumping into something and getting over your head. The members on this board are very good at giving input and know the pitfalls of these cars. As Nick said, the more you can do yourself the better, but it's also prudent to know your own limitations.