This is not directly on topic but I bought the Porter Cable PSH-1 conversion HVLP gun and it's an excellent gun. I got mine for about $60 but they're more expensive now. But I have seen them on eBay for about $70.
I had problems with the gun not spraying properly one time and traced it down to the air hole on the reservoir - it had gotten plugged up. Once I cleaned it, the gun worked fine.
For work in someone's house, I've used it with a pancake compressor and had no problems. But it wasn't a really big job.
Go into the world and do well. But more importantly, go into the world and do good.