You can pick up cheap "interesting" colour paint from a shop that was not wanted/liked by another customer very cheap, but everything comes down to what type of spray gear you have access to and time.
A great spray job is 90%-95% prep/where you paint it, 1% painting and the rest is how you unmask and detail/polish if needed after it is dry.
Tips: 1. when painting if you get a run ignore it and finish the job, then while the paint is still wet take a piece of masking tape as long as the run and sticky side to the run place it carefully over it (the technique will get easier) then carefully puul the tape back off, let the coat dry and fix it with a light bit of sanding then put a few more coats or one good one over it. (hopefully by the second coat you have the hang of spraying).
2. if using a back yard shed remove as much clutter and wet the floor (to reduce dust getting in the paint).
3.buy a razor blade for masking and un masking and also a very thin masking tape so you can easily get your lines right then use thicker tape to attach to that (you will get a much more professional look!)
4. make sure there is nothing expensive parked near by, paying for a respray on 30 cars next door will blow your budget some what
