One of the reasons we have been so successful for the past 17 years is the participation of professional craftsmen.
Groups do it every year.
A large group of unskilled volunteers can make it happen when led by a small remodeling team with know how. Think about it. If you demo a kitchen, but don't have to carry a stick of trash out or carry any of the new pieces in, you can get ten times what you would normally get done in a day. You just plan and place. You know people love to watch you work.