That does sound pretty cheap. In southern Spain I see people horse riding all the time. I live very close to a big city and I still pass people on horses on public roads from time to time. I think the biggest issue would be carrying my groceries. I would probably need a donkey too.
I have always gotten the impression this is because dog/cat healthcare is a much bigger industry and like human healthcare it jacks up the price because it can.
I learned from Rick & Morty that it's because horses have bigger organs so less qualified surgeons can operate on them.