Hey fellas, been a while since I have posted.....ice fisherman...you have received the green light that steel is a longer lasting product than shingles, everyone agrees. The ball is now back in your court...you have to do more homework and look at the available products, to decide which suit your home. This is the only way you will get accurate numbers. Companies will measure your roof and give you an accurate quote. There is a wide variety in products and the cost reflects the differences. IMO I wouldn't recommend the metal products that are covered with pebbles / asphalt. It can't stay on, and fade is a real possibility. I'm not trying to be gruff, but your question is too vague to get an accurate answer at this point. Some of the major players in the steel roof market are Vic West, Ideal steel products. You will see the wide range of products available from just two companies, let alone the hundreds of smaller manufacturers. Cheers M.M.