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People assume there is a fee somewhere. There is not, so here is exactly where the money comes from instead.
Tradespeople price for the worst case when they cannot see what they are dealing with. Two minutes of detail usually saves you money.
Everything else on here is reversible. These are not, so they are worth reading before you tap them.
This is the real decision, and it is the one we can help least with. So here is what we check and what we do not.