Whether doing it yourself or hiring someone, buy the best quality paint you can afford; it lasts longer and in some situations requires only one coat of paint instead of two. Painting a room usually involves prep work, primer and latex or alkyd paints with a range of finishes. HGTV.com gives a quick overview  as well as a list of painting dos and don'ts .
Got two bids so far to paint the interior of a new home. 2,600 sq ft. Was painted with flat cheap paint the first time. The first bid was $17,000.The second bid was $7000. Two coats of paint on ceilings and walls. All doors and closets to be painted too. Still waiting on third painter estimate. I'm wondering if $7000 is too high. This painter has a crew of 5, told me it would take a week. Seems a long time with 5 professionals painting.
"Rafael was very professional, detail-oriented, pleasant to communicate with (responds promptly, returns calls, confirms appointments) and always showed up on time. He painted my daughter's room beautifully and for a reasonable price (offered pricing with and without paint). His work was precise and without mess. I will definitely hire him again for more painting projects."