Ally, I guess you are responding to the other Jeff, as I am very much aware of, and practice as a gca who takes responsibilities for the final product, and pay the errors and omissions insurance premiums to prove it.
I know many people, including my first wife, who have opened consulting businesses in every related field from their home. It's a tough gig, IMHO. Most people will pay for someone who can deliver results, but are always skeptical of paying someone to oversee those professionals with a second layer of people to watch the ones doing the work, although there is some market for that. The cost effective way to do that in golf is to interview and hire the right people as gca or contractors to start with.