We've been in a very rough financial situation for the past few months following a 900 mile move and both of us having to wait more than 2 weeks following that for our first paychecks.
I was going to pay her (obviously, because I'm not a dick) for watching the animals, but in a "thanks so much for helping out, here's some money for your trouble" kind of way when we picked our dog up at the end of the trip.
Pre-emptively, she's decided to use her Rover profile to calculate charges and give me an upfront price for her services. It's more than $100, which with us having to pay for gas to drive down to Alabama and back, plus food and a wedding gift for my brother and his fiance, is A LOT of money.