If this is a 71 RR where are you getting the parts? I thought quarters and other sheetmetal was hard to come by.
Assuming you need both quarters "Fixed" and the A frame I'd say you have 6 days right there, best case.
You'll have three days for minor body and two days to roughly block it out
That's 11 days or 88 hours so $8800.
There will be $2000 in materials.
That's you supplying all the parts and getting a car in primer that will still need final blocking, sealer and paint.
And it's probably best case - $10800