Obviously, IF you can do less work, for more money,...that makes good business sense,...but,.....by treating, hundreds and hundreds of wasp nests, per season,..as opposed to constantly bragging about the mere handful, done for a handsome profit,...you do encounter,.. a hell of a lot of different people...
Many of these folk, will have relatives,.friends and neighbours,..and as such, .they might also have other 'pest problems' that require fixing...
I found that, back in the day,....when I was controlling, all kinds of insects and bugs, plus numerous wild critters,...it always paid to trea