We have so many elderly people here in Florida. I often think of how nice it would be if we could help them take care of their pets and everything else really. I think you have a super idea. If you were here in Florida, you could make a fortune with those types of services. Sadly, there is hardly anything like that around here.
I have a great story about an elderly lady: She was transported by ambulance to the hospital. Her little doggie, Megan, was left behind so her neighbors/friends thought it better if they found a good home for Megan cause someone needed to care for her while her owner was away. Megan was re-homed to a nursing home and became the resident therapy dog. Several weeks later, the lady was sent to a nursing home to live the remainder of her life. Lo and behold...one day the lady was strolling the hallway of the nursing home and she spots Megan walking towards her, very happy. Megan had been coincidentally re-homed to the home that the lady was sent to. To this day, they still live together in the same place. Megan is still the home mascot/therapy doggie but her food and water bowls are in her human Mom's room. Megan's Mom thought she would never see Megan again. That's a true story. Don't you love it?
Best of luck with your project!