Dog Walking...How much would you pay?  

I am thinking about putting up a sign about dog walking in my neighborhood because i see a lot of dogs that don't get walked and i need the extra money.

But i don't know how much i should be asking? does anyone else walk dogs? how much do you charge? and what if they have more then one dog? and what about size of the dog?

30 minute walk (or longer if they want?) + cleaning up after their dog.

i have one dog myself and most of my neighbor have seen me out walking him.. at some point i'm sure lol so what do you think would be a good way to go about doing something like this?