I agree.Once the reduction work is done, and then the design work is done, you may not need nearly as much solar gear as initially discussed ... a prime reason to do the first steps!
Tire warmers (had to google them, had no idea), must they be run all weekend, or for like two hours before you start racing, and then between runs? Maybe you need them for like a total of 5 hours per day at 2Kw/pair (10KwH production)? And only during daylight, when no one would complain about your loud generator?
As for AC, why would you run AC in an empty trailer, rather than crank it up a couple of hours before you go inside, then let the cold desert night do the rest?
You have to map out your real needs and go from there.