I sprayed Zero Gravitas with durepox, I borrowed a spray gun and compressor to do it. It should be feasable to hire a compressor but you might have to buy a gun, all in should be less than the pro.
It was my first attempt at spraying and the primer went on pretty well, the clear was harder to get a good finish with though. The bottom was easy to do as it is mostly a big flat surface. Doing the inside was more difficult with all the tubes and sticky out bits. I got a few runs in corners and on edges.
Time was also an issue. After the first coat it was clear that some areas of fairing weren't as good as I had thaught but I was getting sick of sanding so have not fixed them. Sanding between coats is hard, it is so easy to cut through the colour on an edge, then it all needs another coat.
Getting a professional finish should avoid these problems, but there is a risk of adding weight as they may be more interested in a perfect finish than good but light. Primal Scream ended up heavy I think largely down to the paint looking like a mirror, at least till the first sail.