Need Roof Input

[Filliam H. Muffman]

How old is the house? If you have 3 layers of shingles on it, don't expect there to be plywood on the bottom unless you can see it from inside the attic. I am tempted to say metal or tile, but metal has to be done right or they can mess up the galvanized coating and it will rust. I have seen quality asphalt shingles last 40 years. Anything less than 15 years is surprisingly low.

I would guess a quality asphalt shingle roof will be less than the cheapest metal option. Have you gotten any estimates?