A page builder does not make a site slow — it makes it easy to do four or five specific things that do, without warning you. The hero image trap, the three sources of layout shift, widget sprawl, and the caching settings that break templates.
A build is finished when someone who was not there can change it without breaking it. This covers what to standardise before the first page, what to leave behind at handover, and a simple six-month test for whether the structure held.
A menu page is not a design problem, it is a maintenance problem. Three ways to structure one in WordPress, what each costs the client after launch, and the questions that decide which is right for a given restaurant.