From a hardscaping rookie perspective, the time references are the best part from veteran contractors. Not that I'd be able to complete it in that time frame but to understand the time frames for project completion from contractors of similar size (not solo vs mega company). But that takes experience too. I recently completed a full new build landscape install for a friend with a round corner "wall", new beds, and plantings. I've learned this. - Clean up each day takes A LOT of time (like DVS said) even if you are organized. - I have yet to run into a job without surprises (this one was the sprinkler system lines EVERYWHERE I needed to work) which added hours to the job. -Getting it all level on the base course takes some time but makes the rest of the install go well. - Cutting caps to fit the wall takes time (took me alone 2hrs, but I was working alone) Just need to remember all these details when the next job comes up. That way the estimate can be better.