I have a playhouse/fort made of pressure treated lumber that is in good shape structurally. The playhouse has a sandbox underneath and sits 40" above the ground. I am thinking that the coop would need to be lower than that. Is there an ideal height that a coop should sit off the ground? There are "doorways" in the front (to go down the slide) and in the back (to climb up into the "fort". so these would need to be enclosed and have a "people"door and a "chicken" door. Also the "walls" come up 1/2 way and consist of widely spaced boards. The roof is made of similar boards that are spaced about 1" apart. Not sure why, we just followed the plans that came with the kit. I am thinking of sheathing the whole thing with exterior engineered wood panels I saw at the Homedepot. Any other ideas? Should I insulate the walls? the roof? Usually we get one good snow per winter and several dustings and occasionally a period with sub-zero temps and our summers are really muggy and hot so I would want to have good ventilation/cross breeze. I am semi-handy but don't want to spend more money fixing this up than what I would spend on a ready made coop. Are there any other things that I should consider?