I think one needs to be prudent about "dumping customers" at this time as the full extent of the current lock down hasn't even started to be felt financially yet. If a second corona virus wave materialises you might actually find your services will be no longer required due to a belt tightening exercise by a cash strapped public.
I've noted on this forum an atmosphere of windies metering out instant justice for petty fopars committed by customers. I feel there may be a more Freudian explanation to account to this hostility towards customers, and one can get counselling for this.
In the cold light of day when your customer list has been decimated by a catastrophic recession - all those £10 every six weeks customers you dumped because you didn't like the cut of their jib could have put food in your belly