Regarding the window. Yes it opens it is hinged at the top with a string (or giant mono) or what have you that pulls it up and then you hook it inside. Set it to three different heights. If it is raining bad or cold and windy just close it and look out the window. When you leave just close it and pin it inside to keep owls, wasps, or what have you out. There will be windows on every side. and a door in the back. Ill make more pictures when done. Looks like gonna cost about $100.00 bucks, maybe a little more, havent decided which roof going to use this time. Usually a tin roof over 3/8 plywood. Made at air conditioning shop. Im thinking about fiberglass this time cuz its cheap.