Yeah, I'd be very reluctant to hand it back to be abused again, too.
You might want to do a rough estimate of the hours that were put into the job, as well.
I reckon that jobs that chew up my leisure time are worth a lot higher hourly rate than my normal working hourly. There's the time involved in chasing up parts, too.
So I only do repair jobs for others [except for family,
sometimes] on an 'exchange of favours' barter basis, these days. I don't have a pro-standard OPE workshop available to me, just enough to maintain my own gear. For example, a push mower workbench top, that clamps atop my welding table...
Anyone that offers to pay me to do such work, assuming I'll do it for peanuts, gets told 'you can't afford me'.
