I do alot of catsitting and they, in turn, catsit for me.

If I'm the catsitter and I break something, I replace it....no matter what the cost. I then tell them what happened when they get home.

If I'm away and my catsitter breaks something of mine, I absolutely do not expect them to replace it.

Oh yes, I don't catsit for money....just the pure pleasure of it.