I run Fur-Nanny 911, and have been pet sitting professionally for about 4 years now. I have a client base of 11 clients. I charge $50/day for overnight (I buy my own food). My clients are mostly dog people. Clients with cats have two options. Since cats are much less work, I charge $25/visit. They have the option for daily visits or every other day. Insurance can be expensive. I'm already bonded (fingerprints on file with the FBI) since I was an Auxiliary State Trooper. I sign a waiver holding my clients harmless should I be injured on their premises.

Vistaprint is an awesome place to get business cards printed. They're cheap.

Suggestion: I put my business cards everywhere pet people are. Good way to market yourself!!