I'm late to this thread, but here goes: I charge $20/visit and I don't do overnights. I have in the past added on a $5 charge for giving subQ fluids during my visits, but lately I haven't because most animals are so cooperative for their fluids that it's really no extra work.

Most of my clients are from when I was an RVT, so I have a lot of diabetic and renal failure pet sitting clients.