My first thought would be, find out the building codes for your project. Before you build. I wanted to build a glass greenhouse before I built my polycarb one, and the building codes would have made it totally undoable. I would have had to have an architect design it, and the glass for the roof would have had to be a special type different from the wall glazing. It was coming out at over $150,000 just for the house, not including any equipment or water or anything. Plus here, they have to be built to the current Miami hurricane wind standard, even though we are 5 hours North of Miami. It wasn;t something where I could just sneak it in and say 'sorry' if they caught me.
