Dear Gerald,
Your question is about Budaörs Airfild is a painful story in my life.
Well, we flown over there from the late '60s up till 1990. It is not more than 15 minute far from my home. (That time we used .35 to .46 engines and the bigger circle's radius was exactly satisfactory for stunt.)
At 1990 we simply were thrown out (the army got that airfield.)
After 2000 sporting fliers got back the airfield, hangars, etc. and we allowed to return. I measaured the radius, that is not more than 24.5 meters (80' ) to the street fence. So this is not a question of chainsaw, there is nothing to do. To shift and rebuild the circle & inside fences, furniture, etc. required approx $ 1 million.
I need to tell the "other side" of the story: this airfield is very-very valuable site for plazas, living districts, etc. and many-many gangsters ( let us say "real estate developers" ) tried to buy it. There is only one thing keeps it as airfield: that passengers' service building is a famous, and scheduled monument of Bauhaus style, and not allowed to destroy.