Great thread. It had me thinking about our vehicle stash, which only seems bigger because we plan to move and have to drive/trailer 9 vehicles/4 bikes, as they're all different (muscle car, 'pony car', mullet era factory hot rods, military K5, SUV, crew cab four wheeler) and some have sentimental value to my family (began typing why each one was special and even I yawned, so I'll spare the gang). Many will start and drive, but one needs a short block, one an oil pump, one a full resto, and several of them tires. I have nearly all the parts but will probably buy a new home before I get the chance to work on anything. I may have to hire someone with a big rig to haul the ones we don't have ready when the time comes. The motorbikes can go in the utility trailer behind one of the trucks, so there's the easiest part of the move.
Remember, life isn't a straight line - you may suddenly have the time/cash to dive back into the project. If the stuff isn't in the way, I wouldn't let it burn a hole in my sleep pattern.