Let's go back to the beginning again, and the reasons for a new rebuild. Seals, gravel, paint. The seals can be easily replaced/repaired, but otherwise, it sounds like you're looking for a level of perfection you will never get with a Tesla. Paint and gravel can also be addressed quite easily, but if your trim and doors all lined up perfectly, then you would be crazy to ask for a new vehicle.
However, back to perfection. If that's your expectation, you're in for a bad experience. Not only is this still (somewhat) a first production year vehicle, but it is highly software dependent. You're going to have all sorts of hiccups until the software matures (like missing AutoPilot features, doors that need recalibrating, features that mysteriously stop working, a vehicle that needs rebooting, etc.).
I don't think you know what you're getting yourself into, and I strongly suggest you consider walking away from this purchase. Maybe a year from now things will have stabilized and Tesla might be a completely different story, so jumping in then would be a safer time to do so.