One week of exploratory testing on the part of your product that worries you most. Scoped in a call on day one, written up by day five.
Three weeks on a release, migration, or launch that has to go well. Structured exploratory sessions across your critical flows, plus a review of your existing automated tests.
Ongoing testing for teams that ship every month. I stay familiar with the product, test each release before it goes out, and review new automated tests as they're added.
So you know the cost before you commit. The calendar bounds the scope; how deep I get within it is my job, not a change order.
Then the report says so: where I looked, what I tried, and why I'd be comfortable shipping. That's still an answer — the one you were hoping for.
I review them and tell you which ones give false confidence. Writing new ones is your team's job; the handoff plan tells them where to start.