Don't hesitate to ask all the questions you need to feel comfortable hiring a professional. You can also ask 3-4 professionals to make sure you have the right quote in mind. You must make sure they have a warranty or some kind of paperwork stipulating the quality of their jobs. Insurance is also a #1 priority to consider, as damage can happen in the process of painting.
"I needed to get my house painted quickly and professionally to get it ready for the market as soon as possible. Mr. Corzo responded immediately to my need for an estimate and arrived that day. He offered a fair estimate to paint the entire interior and exterior of my home. Job was completed in estimated amount of time and to my satisfaction. Walter does great work and I would recommend him without hesitation. He was on time, courteous, professional, and an excellent painter,"
"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."