I always try to fund my "consumption" and renting out the MH when we didnt use it allowed us to own it for 3 years, live in it for 30 plus days per year AND sell it for $1600 more than we "paid" for it. 

On the inflation front, the Core Personal Consumption Expenditures Price Index met the Fed’s 2% target in Q4 on a quarterly basis.CBRE ForecastWhile core inflation fell in Q4, jobless claims from a week ago were higher than expected.

Have you given any thought to things like percent of sales you will charge, what types of foods each truck can have (don't want competing trucks), minimum sales requirements to remain, allowing alcohol sales, who pays for trash services, standardizing prices for things like water bottles, etc?

Also, I should point out that your official measurement of water consumption (feeling) won't hold up in any court. 

I ran all the 240v electric to the hot tub & it's always set to 96degF with it being adjusted higher during use, yet the electrical consumption is not noticeable.We do not use anything other than Eco-one to treat the water, but I throw in a cup of chlorine after heavy use.

Very efficient.Chances are the older system has substantial duct loss and should be tested.Mini splits have their place but cold air is heavier and drops so the bottom floor doesn't make sense.Electric motors do not raise in load consumption as they age, it's the mechanical work done that raises load, typically deferred maintenance on belts, shives and pulleys.I'd disqualify HVAC companies by asking; Are you proficient in the new Manual J,S & D standards (that will be required in the industry moving forward)These companies will understand laminar flow, stratification and static airflow imbalances that have a great effect on efficiency, operation and longevity of a conditioning system.Get 3 estimates, compare scope & make sure its permitted.

In terms of best bang for your buck when it comes to energy consumption for heating or cooling, it won't get any cheaper than fiberglass insulation.

In slowdown in consumer spending in Europe, US or Japan will also greatly affect China who is already investing at a higher percentage than their consumption.