@Shanda28 You could find out what a local pet center/kennel charges per night for boarding. I charge $75 or $100 per booking for up to 2 pets. This is far less than the local kennels charge for boarding, so my guests are usually okay with paying the fee. Note: You will have the lady who declares that Fifi is her emotional support animal (ESA) and will not pay any pet fee.
My pet fee also goes directly to housekeeping due to the extra time needed to rid the property of pet fur and dander, and to check the yard for debris (pet bombs). Even though people are requested to not let their pets on the furnishings, they will still sleep with them in the beds and let them on the couches and chairs.