??
And what is wrong with that sentiment
Been running a business for 30 odd years, as such bad payers are removed from list for future work.
Last month went to a boiler where the guy was bleating about repair costs before I even got there. Gave him price for initial one hour visit. Looked at the boiler to indicate the heat exchanger was leaking, showed it to him, gave him a price and said there would be a charge for coming out if he did not want to proceed with the repair.
Once he got the price for the part and labour as well, he starts to back pedal. Told him to keep the money as I will waive the callout charge. Why would you think I should pay him another visit FOC when the boiler really starts leaking??