Greg-That sounds wise. We have a lot of roofs to repair or replace. You're correct that each time we have a leak, it's expensive because we also have to go inside to paint or repair ceilings and sometimes walls.
We are trying a 1 piece PVC roof that we bought for $1,100 for a singlewide.
Metal roofs sound more cost effective. I see that Home Depot has a "Classic Rib Steel Roof Panel",model 2313617 for about $1/sf, with a 45 year finish. Is that what you use? Do you put it directly on the existing roof, or do you create a frame of 2x4's around the edges and put foam panels inside the 2x4 frame?