[squidtone]

Greg,
I did this this past June.
I sheet plastic'd my garage and did the job.
Are you talking about base / clear? Because that is the easiest in my opinion.
I did a single stage about 13 years ago, metallic paint, and it was kinda really hard, and it came out kinda lousy.
I did this last job on my GTO with basecoat/clearcoat and it was much easier. In addition, when you put on 4 layers of clear, you can "cut and buff" it to a super shine. This effectively gets rid of most of all the dust and flaws also.
Turns out the cheapest supply for paint was a local supplier for me. I spent 800 bucks on materials, not including a couple extra gallons of epoxy primer. that was for RM paints.
A cheaper way would be to get all your materials EXCEPT the basecoat from SPI, Southern Polyurethanes. I got some stuff from them, they're great to deal with. SPI only makes a few colors of base. They don't mix base colors to spec. so you have to get it locally unless you're okay with the limited color chart SPI offers.

I'd say go for it. I'm pretty happy with my first base/clear job, except I wish I had just done one thing different....dusted on one last thin layer of base (a 4th coat)....it would have eliminated some slight tiger striping I have. but overall I am happy with it.