re: Residential roofing prices

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Metal roofs will start leaking at the screws every 7-10 years.

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That is not my experience at all. There are buildings on my farm that have metal roofs that have been on 50 years without changing a single screw.
On a house I prefer the look of a standing seam roof. I know of several in my area that are over 20 years old and have had zero problem.
Majority of problems are installation errors. If you over torque the screws on an exposed screw roof then the washer will be damaged.

Having said that a lot of the early roofs were 5v tin that was screwed through the high spots and not through the flats.

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Metal roofs will start leaking at the screws every 7-10 years. Then you have to change the screws and go up in size on the screws. Also many homeowners policies are going to no coverage for cosmetic hail damage to metal roofs, so you can have a metal roof beat up from hail and no coverege under homeowners

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I have hail damage coverage but deductible is 3K on that, specifically. As for the install, my guy tore off old roof and put down new felt, etc. I know many say you can put it over existing roof and/or on runners (forget correct name) but I wanted mine on wth no barrier that keeps it from being "attached" to plywood/felt. As someone mentioned, you have to know how to not "overscrew" them. The screws will have to be changed one day but not in the next 15 years, for sure, if done right.