Asked and answered
With a call and a page of notes, not a proposal. If the work is a fit we write a short scope with a fixed price and a date; if it is not, we say so and point you at somebody it does fit.
Every project is quoted as one number for one scope, and that number does not move unless the scope does. Most pieces of work land between the price of a week and the price of a quarter, and the scope says which.
A single section is a day. A page is a week. A site is six to ten weeks depending on how much of the copy already exists, and the copy is almost always what decides it.
You do, on the day the last invoice clears, including the files it was built from. Nothing is licensed back to you, nothing phones home, and nothing stops working if you never speak to us again.
That is the usual arrangement. We write the sections, your developers paste them into the templates they already maintain, and we stay on the same channel for the fortnight either side of the launch.
Two rounds are inside every scope and they are the point of it, not a concession. After that we bill by the day, quoted before the day starts, so a change is never a surprise on an invoice.
Only if you want us to. Some clients keep a day a month for the year after launch, most do not need one, and we would rather tell you which of those you are than sell you the wrong one.