Tesla maintains a 23% refund rate on reservations across all models. Reserve fee there is $1000. Make of that what you will. The big variables would be a different or broader demographic and respective fervor of the product.
You want a little bulge for off-roading. Protects the wheel and when running low air the rim is more likely to contact tread vs sidewall. Pinch flat!
8.5 on the squatch with a 12.5 tire is a good decision in my opinion.