I used to pay the teen that watched my cats $50 cash for a 10 day trip, that included scooping the litter every few days, topping up the dry food and water daily and petting them as she watched a TV show for 30 mins after school.
I also always brought home a small gift for her.
When she grew up and moved away, my adult neighbor started doing the same minus the 30 mins for hanging out, but she would come in the morning and open the patio door for them and close it in the evening.
I would give her a $50 grocery store GC and a bouquet of flowers from the cats