Finally, a good question. It depends. Was money brought up when talking about the situation? Is this a friend or are you trying to do a small business type thing? If it's a friend, they should offer you an amount, or offer to do something in return for you. If it's not a friend, $5 for gas is not nearly enough for several times a day. If it were me and I was close, I'd ask for $10-$20 per day if it was a friend. That would be a steal compared to what a professional would charge. But, since I have pets, I would do it for free, so that when I needed my pets watched, I could count on them doing the same for me. If it's not a friend, I would start at $25 per day if you are close.