How expensive is electricity in Florida (and what's the typical Supercharging rate)? Paying the same for home charging as a gas car seems unusual IME.
Here I would pay 3.6¢/mile for home charging, except that I've had solar panels for fourteen years so I actually pay nothing for electricity except for the monthly service charge. And that's with a relatively inefficient old Model S; it would be a lot less in a Model 3 and a bit less in a Model Y. Supercharging around here would run about 8-13¢/mile in my car, depending on driving efficiency (mostly speed plus weather). Yes, that's pretty expensive.
When calculating Supercharging on a road trip, however, one should remember that most of us start out with a full battery at the home rate and arrive home near empty, refilling at the home rate. So, a road trip is not just the total miles divided by the cost per mile of Supercharging. It can be even less if one has access to inexpensive destination charging at night. FWIW.