Hi James,
I'm not certain I can escape from domestic taxiing duties yet !
Assuming you are modelling your project along the Community Interest Company design of B4RN, on no account consider any sort of Grant or subsidy which relies on "No commercial operator activity" at present** as you would be in severe danger of ending up in the horrible mess we have with a substandard and insufficient solution and no future sustainable upgrade path, let alone any chance of obtaining another solution for those left stranded with a much smaller ROI on the more difficult outliers.
** You might plan for some funding once you have a viable project well underway though.
Kind regards,
Walter