Assuming from the photo you have a loader. I would guess stripping and installing the loader and frames, tractor split apart and back together with new clutch should take less than eight hours. Add to that any other repairs it may need (or you get talked into) and multiply that by whatever is the going shop rate. A clutch "kit" will run $600 or so for aftermarket to possibly twice that for OEM. Then there's added fluids, filters, and the other incidental charges. Anybody's guess.
I've split a couple 2WD 5300's just for the clutch (bare tractor, no loader) and back together in four hours or less.