A minuteAn online audit tool
Automatic tools check one page or crawl the site and return a list of formal remarks: a long title, an image with no alt text, slow loading. For a first look, that is enough.
What they can't see: Search Console data, competitors' pages, and which of a hundred "errors" really hurts. A report like that has no priorities.
1–2 daysQuick audit
A shortened manual check: a crawl, Search Console and the main templates. The result is a page or two with the five to ten worst problems. We don't go into content or links.
It works for finding out fast whether there is a problem at all: before launching ads, when accepting a site from a developer, after a sharp drop in visits. It has no line in the price list, and we name the amount once we see the site.
5–7 daysFull audit
All three parts: technical, content, links. A prioritized report, a table of every address checked, tasks for the developer and a walkthrough call. From $750.
How to choose. If the site is under six months old with about a dozen pages, a quick check is enough, because there are no links yet and little text. If the site has run for several years and survived a redesign or a change of contractors, take the full audit. The problems lie in layers, and a quick check shows only the top one.