Don't let it run close to being empty. It will start to spit paint out.

Great advice thanks!

An HVLP sprayer is a good investment. Fuji makes really nice ones at a variety of price points. Painting latex paint is hard - it's very thick and you won't get great results from the Harbor Freight sprayers (but those are fine for thin stuff like stain on cabinets or finish coats). If you're looking to thin paint for use with a sprayer, Flotrol is awesome stuff. I use it even when I paint trim with a brush because it increases the working time of good quality paints like Benjamin Moore.

May be Beth will show up, she can give nice advice.

HVLP guns will not be cheap. They are worth their cost though. If you plan on using it as a business it will pay for itself. If a one time deal, look at simple air spray guns. DeVilbiss & Binks are quality brands that make both.

Once you have your gun, practice, practice practice!!!! Do not try spraying your cabinets until you are confident with the fluid motion you need to produce a quality finish. Spray finish is not about applying multiple thick coats, it's about applying a few thin coats. It can go sideways quickly if you don't know what you are doing.

I'm a retired Cabinetmaker/Furnituremaker (due to an injury). It took a few years to get to factory finish quality for me.