This will not solve world energy needs nor compete with industrial energy production
This is a non-profit idea intended as a theoretical means of offering supplemental income to the disabled
This is in no intentional way meant to belittle or force servitude upon those with dissabilities. If implemented it would be voluntary participation
Yes not a typical business and finding capitol/investors will not be easy, likely in the form of charity (perhaps salvage?)
That said....
A local non-profit (http://www.ksiinc.org/index.cfm?ref=40100) works to help disabled individuals find meaningful employment, income, and community involvement.
Rough Idea
Starting with gravity generators as a cornerstone build a non-profit 'business' where the workforce maintains the function of gravity generators (particularly during peak times when the local power charges a higher pkwh rate) said generated power bought at a rate below market average by the power company.
It could even start a small program for KSI to simply power their own lighting and such.
Still a layman and hobbyist in this area but some concepts of power/function of the non-profit
Gravity generators,
Residual income from solar panels (minor and questionable investment but the workforce could keep them clean and maintained)
Yard and other waste use to run TEG, gasification, and steam machinery while perhaps selling biochar.
Human powered water pumping methods to store large amounts of water for hydro electric, not fully draining the tank but maintaining a certain level to meet a pressure requirement.
Scrap/salvage of electronics for sales to junk yard and production of further generators, perhaps a community service/high school science team effort.