My parents also do the same sort of thing with groceries and stuff like that, but I found out real quick that you gotta cut out all the little extra things that you don't realize you spend money on when you have steady income. But you could get a decent older bike for about 1,500 to 2,000. I have been looking for one and that price range can get you a real clean mid 80s Honda.

__________________
1996 Ford Ranger STX 4x4 4.0L
1983 Honda Shadow VT750C