[kvmet]

This kind of thing destroys freelance devs who don't have context.

Customer: "Hi we need this small change." Dev: "No problem! Here's a quote for 4 hours"

Ignoring that 4 hours is probably less than the effort to consult, estimate, generate and process contracts, bill, do taxes... Then the customer comes back and asks for a revision which will at least require a Change-Order or a separate PO.

To some extent the overhead should be covered under labor burden but the reality is that in a sole proprietorship YOU are also the person doing the labor that is within the definition of "labor burden". It adds up extremely fast.

A million dollars would be a windfall if it landed in my checking account. On a development project with hardware and more than one dev it might as well be dust in the wind.