I get $50 a day for 2 trips and similar work. I also feed/let in and out and dogs or cats the owner has as well. Location plays a part though, I am in the middle of nowhere so it's at least 10miles one way usually.
I don't consider than enough, Delfina. 40 miles a day and all that driving, plus gas cost?
When I was able to get about, I used to babysit my daughter's horses for a week at a time. She would try to not have too many or any, inside stalls while I was there. Hay was stacked by each corral, so I wouldn't have to haul hay very far. I would change water of course and feed all horses, twice a day. I also fed her dogs and cats.
I stayed at the house, so no driving involved. My daughter never leaves her horses or home, with nobody there, if she is leaving for more than a few hours or less, in a day.
Something others might find useful.
My daughter always left a few signed checks, in case of emergency, plus some cash money.
Full refridgerator. :)
Her trailer was hooked to her truck, in case of emergency.
A list of Vet numbers and several neighbours, in case I needed them. Her closest neighbour would also check on me, once a day.
A list of days the garbage would be picked up or pool man would need to be let in etc.
Numbers where I could reach her at any time.
Only once was there ever a problem, when things got a bit scary. The mountains around caught fire and it came very close to the ranch. Down to just across the street, in fact. I could feel the heat and the smoke was dreadful. So I did sit with the horses, while the air-drop helicopters went overhead, so low they just missed the trees. The Gypsy Horses didn't bat an eyelid, but the pinto and Arabian rescue horses were going crazy. The fire crews were fabulous so nobody had to evacuate.
While I considered this my holiday each year and to get my horse fix, my daughter still paid me $450 per week. Of course I also did things around the ranch, just because I wanted to. Things like watering all the trees and plants and weeding if I felt like it. And of course, me being me, I always cleaned the house so it was perfect, when Steph came home. I suggest if you have pregnant mares, however far along, you never leave home for more than a few hours. More than that, have someone staying on site, who knows about foaling.