A lot of good solid advice here, and every point has it's own validity. Our Charger and Chally were good solid cars, rust issues were very slight. As I do not have the tools, space, or proper skills they both went to a shop for body and paint work. But we stripped them to a shell before they went and we did the interrior work and reassembly ourselves, and both are nice cars, but to some they would be considered nice canadates for restoration,
The Roadrunner (clone) was a rolling shell, but the guy had done the body and paint work already, but there was absolutely nothing else, there wasn't even a sterring wheel, we kicked the tires to "steer" and pushed the girl into the garage. We did everything to build the car from the undercarrage to the interrior to building the engine, but had the tranny rebuilt at a shop. Three years later we have finally put about 100 miles on her in the last month. Each has been fun and frustrating at the same time for different reasons.
I guess it just depends on you, like so many have advised...........if you got the tools, the room, and the know how you can do it all yourself, but it will be a slow process. Another advantage to doing as much as possible yourself is that you can work around a budget, you don't have to come up with all the $$$$$$ at one time. The ultimate answer for you is this..........buy a turn key car you like, and enjoy it NOW ! Then buy a project car and understand what most of us have been through.
Either way, both ways, you'll have a blast in the end. Good Luck