Boy that sounds great. I've always wanted to build a stone house. I also like standing seam metal roofs (they are also outlawed in many HOA regulations). Metal roofs with clip systems survive hurrican winds very well, provided they are greater than 4:12 pitch.
Stone construction is greatly dependent on geography. Places like Philadelphia have perfect stone which does not need to be split or cut. Here where I live in Wisconsin, there is plenty of field stone but they need to be cut and split. I figured the best way to test my resolve was to build some dry-stacked walls around my garden to keep out any livestock that got loose. It took me three years of splitting stone to build 200 feet of wall, 3' high and four corners. The cap I did in slate. I came to the conclusion that on hard stone like here, it would take me about 15 years to cut/split enough stone to build a true stone home.
Terry Gilliam of Monty Python fame spends most of his time building dry stacked walls for people in Italy. He's a genius at it. I once got to admire his handiwork when on a trip there. I photograph the stone dwellings in any town any time I see a different stone type or construction style.