Hi all! I have a 5 bedroom home (½ duplex) and I need to paint everything (interior and exterior). My brother and I will be doing all the work and I was thinking that an airless sprayer could really cut down the time. One person could spray and the other could back roll. I went down to the Home Depot and they said that the problem is that airless sprayers will take an extreme amount of prep. work. I would only want to buy if the amount of time saved would pay for the sprayer. I also was looking at the power rollers. Does anyone have any advice as I don't have any experience with painting.