We had a central vacuum when I was a kid, and we hated it. The best use for a central vacuum system is to rip out the vacuum and use all the tubes as conduit for wiring. I guess that's really very much a matter of opinion. In any case, be sure you test one out before insisting on putting one in.
Agree that you have to try one before you get it. (My previous house had it.) I love the relocated sound, it's a lot quieter (still a little noise due to all the air motion, though). The newer ones have power-attachments available for carpeting. My builder's central vac guy gave cheap-o attachments. I bought new ones from amazon.com afterwards.
You also missed it on the power in the garage. You want 50A, not 30A. You can download the recommended installation guide from Tesla for a NEMA 14-50; use that and you should be good for anything. It's always better to overspec and then not need it than to underspec and have to go fix it.
LOL. I HAVE a Tesla. Didn't realize it was 50A (or just forgot). You're absolutely correct.
Speaking of garage doors, you can get some really great openers. My in-laws got some professional Lift-Master openers that are absolutely silent. That's nothing like what you get when you buy your own at Lowes Depot. (They even have some that attach directly to the torsion rod if you have that kind of door, so there's nothing overhead.)
Agree about the garage doors. I have the Lift-Master as well and it's fantastically quiet.