As an Administrative Consultant, you aren’t selling “services.”
You are offering one thing: a collaborative and ongoing administrative support relationship.
See? ONE thing.
It’s the relationship that is the product, not the services.
What administrative work is involved in that support relationship depends on your target market.
What you should be focusing your marketing message on is what that relationship looks like and how it improves the life and business of your clients and all that they stand to gain by working with you.