Here is how I would expect a pro to spray paint kitchen cabinets. A brush painted job would differ slightly in that you wouldn't hang the doors to paint. You'd place them on a work table or easel instead. It's time intensive work, and should take 7-14 days to accomplish completely and cost between 3K-7K depending on kitchen size and amount of detail in cabinets. Remove doors and drawer fronts. Remove hinges and hardware. Clean with TSP (tri-sodium phosphate) Rinse and let dry. Scrape any loose finish. Fill any damaged spots or hardware holes that won't be reused. Sand fill smooth. Scuff sand the rest. Tack off dust. Hang in dust free paint booth with wires through hardware points. Tack off dust again. Spray with alkyd based primer. Scuff sand again. Tack off dust. Spray with second coat of primer. Spray with first finish coat of latex enamel. Spray with second coat of latex. If glazing is to occur, that is next. Spray with conversion varnish. (If being brush painted, this step is typically skipped.) Add more molding or decorative details to boxes, filling nail holes and sanding smooth. Repeat prep process with face frames and exposed cabinet sides using plastic to create a spray booth on site. If interiors are to be done, they are done before face frames and sides. Interiors are difficult, and add both time and expense to the job. Allow everything to fully cure. Clean hinges and hardware and clear coat if you're keeping the old hardware. Install new (or old) hinges and hardware. Re-install doors and drawers and adjust for proper clearances. If you are receiving a job without this amount of effort, then you are not receiving a quality professional job.

Excellent! Great trim on those cabinets. Post here when you update. It will be very educational. :)

I had my cabinets professionally painted last year. My cabinets are white, but they had gotten chipped and worn over the years. That said, I had them repainted in the same color, so I did not have the insides done, just the outside of the doors and drawers. My painter sanded them and applied three coats of paint with a professional spray gun. I have a very large kitchen, I think I rememeber him saying 46 pieces all together. He also repainted the bottoms of the cabinets and around the island. I paid $2,800. I live in Northern NJ and everything is more expensive in the NY Metro area then most of the country. Is that about what you had in mind?

If you use thinner, you need something to protect the floor if it's anything other than a ceramic tile, and even then it's a good idea to put down something. Also if you're going to work with thinner, make sure you use the right kind of gloves. If the thinner gets trapped against skin, it may cause a nasty burn.