Re: weight distribution during conversion
Do pay attention to the front-to-rear balance as well as right-to-left. While most Skoolie conversion interiors probably weigh less than a high school football team, you will note that the carrying capacity of a dually rear axle is more than that of the steer axle. You want to have the weight properly distributed, and not all up front or on one tire.
Small planes (and large?) usually have a fixed starting point including installed equipment. The fuel, passengers and baggage for each flight can be added to that at each "station," and calculated so the plane flies neither overloaded, nose-heavy nor tail-heavy. A fixed starting point for a Skoolie who cares could be having the bus weight at each wheel measured after the seats are out, and then adjusting for each item added to the build.
Someone said "Making good decisions comes from experience, experience comes from bad decisions." I say there are three kinds of people: those who learn from their mistakes, those who learn from the mistakes of others, and those who never learn.