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.
"We are very pleased. The bid was mid-range to low (compared to the others). This job was begun the very next day with a crew of 3 - 5. The work (paint, carpet, insulation, cleaning, deck wash and stain) was completed in 5 days - a very fast timeline!! The workers were polite, professional, cleaned all debris. I highly recommend Antonio and his business for any home repair needs. Blessings to them."