Advisory Retainer
An ongoing partner for whatever's next, sometimes a thinking partner, sometimes hands in the work with you, most engagements land somewhere between.
Activities could include:
Regular working sessions, as often as your business needs
Standing availability as a thinking partner for decisions as they come up
Direct involvement in the work between sessions, when that's what's useful
Support that flexes with what's actually happening in your business month to month
Investment: Priced and scoped per engagement.