That said... the lower price that people get from me does not include the assurances that accompany an insured professional. These people take a risk everytime they let me into their home, because if I trip down the stairs and break my back, it is they homeowners insurance that is on the line. If I stupidly step onto a granite countertop overhange and snap it, I have not liability insurance to sue.
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.
Interior painting can be an inexpensive and creative way for homeowners to demonstrate their style and personality. There are numerous colors and textures of paint available, including options with extra or no shine. Whether you choose to paint your entire home, a single room, or just an accent wall, a new coat of paint is a great way to give your interior a facelift without a lot of investment.
Entire interior house painting job (excluding ceilings). 3 Bedroom / 2 Bath, Kitchen, Dining Room, Family Room, Living Room and Utility Room. Nothing really out of the ordinary, single level, no unusual architecture. I got estimates from professional painting companies, both small and large and individual "painters for hire". What surprised me was the huge range of estimates. $2,800 on the low end to $10,500!! on the high end. Finally went with a small family company at $4,500, (the lower bids seemed a little disorganized and unprofessional). The company I went with may not have been the lowest bid, but they seemed to know their stuff, spending over two hours doing color matching and comparisons just for the estimate. I couldn't be happier with the result, all their suggestion's were spot on, the house looks amazing!
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 .
I have been painting for 7 summers as a side job with a school district. I have been asked to paint a friend's house and I don't want to over charge but it will be a lot of work. She is paying for all of the paint and supplies-----5 average sized rooms plus ceilings, ceilings in 3 additional small rooms, and all window and door frames. I need some advice!!!