Every agency I've worked near opens with a build fee. Fifteen hundred, two thousand, payable before anything exists. For a salon with two chairs that is a month of takings on a promise.
So there isn't one here. The build is in the monthly price, which means I only get paid while the thing keeps working — and if it stops working for you, you leave and I stop getting paid. That seems like the right way round.
It also keeps me honest about scope. A site that takes a week to build and earns £20 a month has to be genuinely useful by the second month, not impressive in a pitch deck.