Wow, sorry to hear that. I'm also in Vegas and have very similar loads (2x 5-ton, 1x 2.5ton, pool/spa, car charger, etc) -- but I luckily already had 300A serv

Wow, sorry to hear that. I'm also in Vegas and have very similar loads (2x 5-ton, 1x 2.5ton, pool/spa, car charger, etc) -- but I luckily already had 300A service. I agree with the some of the other comments; you absolutely can "get by" with 200A. FWIW, I rarely use 50% and my car charger can pull >=72A by itself ("dual onboard chargers"). I checked into smart panels just because I was interested, and that may be the way to go for you (Span wasn't serving this area at the time FWIW), but you may have other options that are still up to code. My garage had an extra unused "dryer" outlet even, prior to installing the dedicated charger, and I have another outlet in an exterior garage too (probably was originally installed for welding, I've never used it). It's certainly doable as far as the physics go; how much hoop-jumping you'll need to do to pass an inspection though, is another question, but it might be less than you think. I'm not sure what the inspection requirements are for the "isolated solar" idea, but I'd _guess_ that it's similarly cost prohibitive (not sure if the "NVE off-grid fees" would apply at existing residence or not), and you lose some of the benefits of solar -- net metering & pseudo-arbitrage of TOU rates + "balancing" panel/system load (mostly applicable if you do ESS), etc. Feel free to reach out (email in profile); I'd enjoy hearing more about the situation & perhaps could provide some guidance or ideas. :)