Thing is, what is needed depends on what you are doing.
That is what experience around the world has shown - and experience here.
So, for at least 50 years, no UK airfield fire service has been any use at all to save lives of trainee pilots or their instructors!
Microlight schools don't have to have fire services etc etc. You can teach out the boot of your car! (I did teach once out the back of my camper van!)
So get an aircraft and start barnstorming.
Reckon there must be a good bit to be made from airfields like Dornoch with trial flights. A week there, a week at Plockton, a week on Mull, a few days on Bute. Bliss!
It is all possible now.