What you get
The person who finds it, sizes it and builds it is the same person. When I take the URL inventory from your old server, I also write the redirect map and test it before launch.
The person on the first call is the person on the last call. Every email about your project is written by the person doing the work, usually the same day.
Prices are fixed after scope because there is nobody to bill by the hour.
The trade-off
There is no bench.
If I am sick, the build pauses. If two projects collide, one waits, and I say which before you sign.
The risk is handled structurally. A named developer is briefed on every build, with the handover document written as the work goes. Every account is registered in your name: domain, hosting, analytics, Search Console, the code.