Most of the work was contracted. Yes it added up. I also became a real good general contractor...
However a lot of it required very special skills [painting etc] and tools that I do not have. While I can do basic fiberglass
work the experience that a guy who does it everyday was added value. It was better for me to hire experts to do it right once while I worked than to take 3X or more as long for me to do on weekends or vacations. Some of the stuff I did but it was not the big jobs.