Landing page vs website: the deciding question
How many distinct audiences do you have, each needing a different next action? One audience with one action is a landing page, and one page gets exactly one job. Several audiences, or one audience that genuinely needs to research before committing, is a site.
The common mistake is confusing services with audiences. Five services sold to the same buyer, for the same reason, is still one page, the buyer does not want a menu, they want to know whether you solve their problem.
The opposite mistake is building a site because it feels more legitimate. A thin ten-page site is less convincing than one page that answers everything, because every page you add is another page that has to be worth reading. It is the same instinct that keeps a business on a template it outgrew two years ago.
Count audiences and actions, not services and ambitions. The number is usually smaller than the org chart suggests — and if someone in the room is asking for a mobile app instead, the same count answers that too.

When one long page beats five short ones
Trdelnik had two audiences that look incompatible: an investor evaluating a bakery franchise, and a customer who has to want the pastry enough to queue for it.
Splitting them would have lost both. Instead the investment case runs at the top with hard numbers, and the appetite case runs underneath in the brand's own voice, down the same scroll.
It works because the two audiences overlap more than they appear to. The investor's real question is whether people will queue, so the appetite half is not a distraction from the investment case, it is the evidence for it.
The upgrade path
Build the landing page so it can become a site. Real sections that could each become a page, a navigation structure that can grow, and content held in a structure rather than baked into a single layout.
The cheap version (one flat design, everything hard-coded, no content model) cannot be extended. It can only be thrown away, which is how a landing page becomes an expensive rehearsal. It looks like a saving right up until you compare it against what each budget band actually buys.
Decide the shape of your content even if you only have one of each today. It costs an hour now and it is the difference between growing a site and starting again.
Questions we get asked
Is a landing page cheaper than a website?
Usually, but that is the least interesting difference. A landing page costs less because it makes fewer promises, and a business with three real audiences that buys one page pays twice: once for the page, once for the site that replaces it.
Can a landing page rank on Google?
For one query, yes, and that is its ceiling. A single page can only be about one thing, so it competes for one intent. If you need to be found for six different questions, you need six pages that each answer one — which is a site.
How many pages does a small business website need?
Count audiences and actions, not services. Most small businesses land on four to six: home, one page per genuinely distinct offer, proof, and contact. Anything beyond that should have to justify itself, because every page you add is another page that has to be worth reading.