Maybe post an ad saying you would pick up pets, take to Vets. and back. Lot's of folks need this service. Old folks who don't drive anymore, and career people who usually don't find the time.
When mine were little I drove school bus. I took the youngest who wasn't in school yet with me.
Do you like baby sitting? That pays a lot. Also being a foster home pays quite well per child.
If you can sew, paint or draw, you can make doggie items, drawings or paintings and list them on the net.