What's a good business to start with these interests?

I am toying with the idea of starting a business. Difficult during these hard times I know but I want something I can turn from a hobby or interest into something I can truly love working at.

My interests are mostly in the pet business area. My entrepreneur class focused on establishing a cat boarding business as my project. That I may be interested in. I like the outdoors and was considering a dog walking or dog clean up business. I love animals in general and am concerned for their well-being. I like to see dirty dogs cleaned up to be the best looking that they can be (dog makeovers!) and I love coffee.

My ideas were a dog wash/coffee shop combo, either self serve pet wash or grooming available with a waiting area that sells coffee - OR-

The cat boarding business, which would require me to renovate an existing kennel to be more comfortable for our feline companions

Or dog walking/dog sitting/cat sitting.

I have experience as a vet tech so I could give medications to boarders if they required them.

What do you think is the best idea? I live in an area that is mostly middle class, but I'm near Annapolis so I think there would be some richer folks that would cater to their animals more.

Looking forward to hearing your ideas and or suggestions! Thanks!