One of the things that an amateur painter (like me) eventually learns the hard way is that the choice of equipment may not be the most important factor, but instead the control of dust and air flow. In other words, you need a place to paint that minimizes dust and prevents effects from wind and other external air flows. At the same time, you need a way to extract paint vapors, that can hang in the air like fog for some types of paint, that come from using compressed-air painting equipment. It’s why professional painting establishments have paint booths.
Bottom line: it’s not easy to do a good job with good equipment in the wrong environment, and all too easy to get a bad result.
Good luck!