In no particular order:
- Since the insurance company paid it off, it's officially a Salvage car and will be marked as such in various databases, including those sent to Tesla. Tesla will cut off Supercharging for this vehicle until it can be proved that the car is totally functional.
- No offense, but this isn't a jalopy: It's a BEV. Yep, BEVs can be repaired - but the people who are doing it aren't Ye Random Auto Mechanic, they're people with specific training. If one wants to do it, more power that person - but one's going to need specialized tools, mainly computers, and the software to do diagnostics. That still won't stop one from Getting There but it's going to take a certain amount of training and education. It's going to be slow going.
- I've had cause to overhaul a VW Beetle. Admittedly, a VW of a certain age has a certain resemblance to a lawnmower, but that is a 4-cycle engine in there. It's possible to get the engine and transmission out of that car without a lift, especially if one has a couple of friends to lift the body off the engine. And, from there, to disassemble the engine, get the piece parts bored and run through a machine shop and all. But a BEV.. is heavy. Yeah, some folks have a lift installed in a garage or some such, but one'll need that lift to drop the battery and fix it. If it can be fixed. There are third parties who revamp Tesla batteries, but the usual assumption that the only thing wrong with said batteries is that they're old and worn out. That's not your case.
- Body work is always fun. My understanding is that there's worse things than Teslas to do body work upon, so, again, it's possible and there's lots of third parties who'll do it for one, for $$$.
So, if you're planning to have at it yourself and you've got the basic automotive tools and training, sure. But it's going to be more like a labor of love and less like saving money. Really, it'll totally depend upon your skill set. Look at Munroe and Associates: They break various cars down to the original parts and have the skill and training to put them back together again - but those guys and girls
have the training.
Once you've got the car back to its pristine original condition, there are
rumors that a paid-for inspection by Tesla can get Supercharging back into its future. If you don't care about Supercharging, than that's not an issue. If you do.. it's time to make Really Good Friends with a Tesla Service Advisor and find out what's required.