In order to be a flight instructor you need 5,000 feet hangar space, 1,500
feet office space, plus two airplanes, one of which must be IFR certified.
This is the official rule, in writing and enforced by the airport authority.
What this effectively does is exclude any competition for the one flight
school on the airport.

There is also another loopy rule which excludes A&P's from working on
aircraft at this airport, unless for the monopoly on the field.

Check to see if there are any conspiracies in restraint of trade or
competition at your airport. You may have a bizarre rule like this giving
someone or a company a monopoly on your airport.

These illegal, unAmerican rules founded on greed will shortly be dissolved
or litigated, you can be sure of it.