Quote: by why does everyone seem to feel it will take double the money to restore this car over any other 72 RR?
I don't. To be clear; I believe that a proper rotisserie, every nut and bolt, farmed out to someone that knows what they are doing, resto costs that much no matter WHAT car you are talking about. Other than some rare parts that some cars have and a +/- for rust repair, the cost to restore a car doesn't vary much from model to model.
You can "fix up" this car for less, but not restore it properly IMO. I think it's rare enough to deserve a real resto.