Dog Walking in New York

Lately I have started to think about dog walking as a part time position and if I so unfortunately get laid off, perhaps a full time job.
Here's the deal - as a dog walker, you have to have the ability to walk multiple dogs at the same time, and be able to scoop up all their poops and take them for a good walk for half an hour. And to make it a profitable venture, you need to have the physical stamina of walking that much all day long.

Well ok this picture is a bit of an exaggeration. But I have to admit though - I am very impressed with this dog trainer. He was able to handle 14 dogs at one go and have them all listening to him. As much as I love dogs I doubt I have this ability to handle 14 dogs in one go. But then dog walking is unlike dog training.
But I have to say though- New York with it's dime a dozen bankers, white collar professionals who live in apartments yet still cared for a pet and it's welfare enough to hire someone to walk their dog while they are at work - this is probably the only city in the world that someone can actually be a professional dog walker.
Say it cost about 25 dollars per dog per half hour walk. Imagine you walking just two dogs in one go - that's 50 dollars of pretty much tax free money. That's sure as hell more than what I'm making right now.
So if things continue the way they are, who knows I might be able to make a living out of being a professional dog walker and perhaps play some poker on the side.