Well, some do it all types are actually not bad painters, but this is very, very rare. Anyway, whether or not you spray or not really doesn't matter. A pro uses the sprayer to get the paint on faster. Whether or not it is sprayed, the actual paint gets rolled no matter what. We call this backrolling, meaning application of the paint with a sprayer, then physically rolling the paint while it is still wet. If you just spray it on and leave it, it's fairly likely that the paint will dry uneven and look crappy. The roller helps to even everything out. The only time I would spray walls or ceilings and not backroll is if there was a heavy texture or popcorn, which would disguise the uneven look you may get on smooth drywall.

If you can afford it ,I would find someone who does it the real way, brush and roll.More paint where it is supposed to be.

"combination of spray and paint/roller". To get a quality paint job using a sprayer, it is critical to back roll following the spray, (typically one painter spraying with another following behind with the roller). The most important part of any paint project is the prep. Sanding/scraping, priming, filling/caulk followed by two finish coats after all has been properly cleaned typically gives longevity using quality paints such as Sherwin Williams or Ben Moore..

First off I do all the painting and have been for too many years. Hubby hate to paint. I use satin on my walls. My kids are all grown and I still use it. I only had 2 children so there was average abuse to the walls. Used eggshell once when my children were young and it didn't hold up and it did have a cheap look to it like flat paint. Flat paint is the cheapest paint you can buy and looks it, then eggshell is next to cheapest. I recommended semi-gloss due to its durability if you have a lot of kids. Yes it has more of a sheen, but if you have a lot of kids to take care of, who is looking at the sheen on the walls. With kids I wouldn't recommended anything less than satin. Take it from a mom who son drew on his bedroom walls with an ink pen 2 days before putting on the market. 4. Semi-gloss Semi-gloss paint finishes are known for both their durability and washability. The paint, with its medium sheen, is well-suited to moderate and high-traffic locations. Easy to wash, the paint is used on woodwork and trims and is often used for covering the walls of a children’s bedroom or playroom as well as the walls in the kitchen or bath.