As far as the article 220 service calcs go, I think the RV service load calc is correct.
As far as these farm size well pumps that have 3-phase motors and a factory matched VFD / motor controller / phase converter, I would tend to ignore the 3-phase motor and go with 125% of the single phase input nameplate of the combo VFD / controller / phase converter as it probably falls under 430.120 or Article 455 phase converters or both.
My rationale would be its a single phase service, and the well pump controller is more like an appliance than a 'motor'. Much like many other VFD driven appliances these days that may use a three phase motor internally, but are single phase input.
