A bloke I used to work with did it, he got a van on lease and a contract with Business Post.
They did all the sign writing on the van for him too.
He said its good money, but very long days and alot of hard work.
He said the worst bit is, if you are ill or on holiday etc, you arent getting paid!
It was also part of the contract, that if you are off for whatever reason, it is upto YOU to get the route covered by someone else!