Re: use a sprayer to paint the ceiling?
To be honest, that's not much area. Even you're painting out the entire room it's not worth renting a paint sprayer, because you'll spend more time in prep and clean up than you will if you'd have just rolled it to begin with. Don't get me wrong, I'm all for time and labor savings, particularly with paint. I just don't think you'll get a return on your time and money. The caveat to this is if you have acoustic texture on the ceiling, then spraying will be the best means of applying the paint to prevent a gooey, gobbed on look.
If you do painting on a regular basis then you might want to think about picking up either a Wagner type sprayer/power roller or a used professional airless with a power roller attachment. I've got the attachment for my airless and it does really make a huge time savings not having to dip in the paint tray every 5 seconds. With a power roller you merely tap the trigger periodically to keep the roller full of paint, the roller never leaves the wall.
I suffer from CDO ... Its like OCD, but in alphabetical order, LIKE IT SHOULD BE!!!