Two paths for writers who want to grow: serve many clients with one service, or serve fewer clients with multiple services. The first scales faster but spreads you thin. The second builds deeper relationships but limits how much you can earn.
Almost always when you are scaling something you fall into one of two categories. This is especially true for ghostwriting. You are either providing one service to lots of people or you are providing lots of services to one or two people. If you want to build a business, which means at some point you're going to elevate yourself to be an operator, you want to do the one service to lots of people because the more that you add the more complexity that you create the harder and harder it is to scale. So you pick one thing then you hire a couple people to do that thing and then you manage the people who do that thing. If you don't want to do that and you want to stay in the work then it's actually better to do lots of services for one or two people. You go I enjoy being a writer. I enjoy talking and getting to know these one or two clients. There's something to be learned from both. But.