Notice how we repeatedly state that gravity does do work. If it does work it consumes energy, but that energy is limitless, so although it expends energy, it never runs out. It is perpetual, so now we have a force which apparently consumes energy and does work and does not exhaust its energy supply. If that does not decribe a force which can supply endless energy, I don't know what is.
I will be posting my own thoughts on this as soon as my wheel has been finished and tested - working or not.
Please share the following link and donate if you wish to aid my granddaughter's treatment.