On paper, a wall going from bare to finished is two jobs: plastering, then decorating. Plenty of people hire two separate trades to do them, and plenty of times it works out fine. But the place it goes wrong is always the same: the handover.
When a plasterer finishes and a different decorator starts, nobody quite owns the join. The plasterer says the wall was fine when they left. The decorator says it was not flat enough to paint. You are stuck in the middle, chasing two firms, and the finish is the thing that suffers.
The name Rush n Brush is literally the two halves of that job. Rush is the plastering: rushing and skimming a wall smooth and flat. Brush is the decorating: brushing the paint on to finish it. Doing both with one crew means the people who skimmed your walls are the ones who paint them, so the surface is signed off by the same hands that have to make the colour look good.
It is simpler for you, too. One point of contact instead of two. One quote that covers the whole job instead of two prices that do not quite line up. One team to book around your life instead of coordinating a gap between trades. And one crew taking responsibility for the finished room, start to clean-up.
That is the whole idea. Not cheaper for the sake of it, and not a hard sell, just fewer gaps for things to fall down. If your walls need taking from bare to finished, tell us about the job and we will quote the whole thing as one.