I've been pet sitting for many years. Initially, I did it for free for neighbors, friends, and relatives, then I started doing it as a job. I can administer medications as needed. I have no problem going for long walks, even in the rain (I'm used to it, having Maremma Sheepdogs). I'm not working right now, so I have the whole morning and afternoon free. I have two kids in school, so the only time I'm busy is when they get home from school, but after this moment I can be free. But if you have an emergency, and i take your pet immediatly, and i can't leave my children with anyone, know that my kids are used to having animals at home, so they will respect and pamper your furry friend, obviously under my constant supervision.
I'm a very affectionate pet sitter, so I need to know whether my pet likes physical contact or not, and if there are any types of petting they don't like. I really enjoy playing physical games where my pet can run around and move their entire body.
I have a habit of sending photos and videos to my furry friends every time I get home, and if the owner asks, I'll even do a video call. At the owners' homes, I get into the habit of changing their water and food, and while they're eating, I check for any scattered "treats" and clean the litter box. If the owner wants, i open the windows to change air for Pets! After that, I get into the habit of spending some time with them, playing and checking to make sure they're healthy (touching and massaging them). Finally, I close the windows (if you had them open), change the water in the bowls again, and add more food if recommended by the owner. 
As for the dogs, I come home and, after a quick cuddle, I immediately put the leash on them and we go out. When I get back, I change their water and serve them their food. I calmly wait for them to eat while I check the house for any "treats" (and open windows of owner wants). When pet finishes eating (in case i close Windows) and i'm leaving. 
At my house, however, they'll be with us all day, sharing the space. There will be two or three walks (depending on their habits) and lots of cuddles from everyone.