Yes — under either option. This was the board's biggest question on our call, so let us be precise about it.
The custom build includes a page content editor: every front-facing page's headings, paragraphs, and photos can be changed by any authorized volunteer from the admin area — the same way you'd edit the Fog Horn or the calendar. Prices, fees, events, tickets, documents, and member approvals are all self-service too. The only thing reserved for a developer is building a brand-new type of page or restructuring a layout — which, in our experience with community organizations, comes up about once or twice a year and is covered by your support plan anyway.
WordPress extends that one step further — volunteers can assemble entirely new pages with a drag-and-drop builder. The trade is a busier dashboard and the plugin stack described above.