As a PM, how about my biggest complaint about homeowner clients?
1. Clients that are penny wise, pound foolish. They won't let us replace a nasty old barbeque grill for $129, so all of the guests are angry and complaining. So we just replace it out our expense and eat the cost.
2. Clients that reserve a bunch of nights for friends and family, many of them eventual no-shows, and then give us grief about how the cabin had a bad month.
3. Clients calling us complaining that their rates are too low, but now calling us to tell us to slash the rates because there are open nights.
4. Clients that think they know better how to repair a hot tub from 1500 miles away than our guy that fixes one a week.
5. Clients that decide to save a nickel and not have us do monthly pest control, and then are mad at us when they show up and the fascia and soffit is eaten up by carpenter bees followed by woodpeckers trying to get to the larvae, followed by snakes and other critters claiming a new home, claiming "You're not keeping our place up!"
6. Clients that refuse to keep up their stairs/steps/railings as a cost saving measure, we have a slip and fall, we get sued, and pay out $250K as our part of the settlement.
7. Clients that refuse to maintain their private road, and then demand that we go out in a snowstorm on Christmas Day to help drag a ticked-off guest out of the ditch.
8. Clients that "have their own housekeeping" and then get mad at us when we get negative reviews about housekeeping.
9. Clients that won't pay to get a dead squirrel out of the lower chimney "Don't worry, he will rot pretty soon", and the guests have to leave because the place reeks of dead animal, and we have to refund them a week's stay. And the client is mad at us.
I could continue this list to 100, but I'll refrain.