I got a gravity flow wagon dirt cheap so I put a floor in it and built a blind on top. Have a lot of room inside. Advantages is that I can move it if needed although its been in this spot for 4 years on the edge of a food plot with prairie grasses behind. Disadvantages is that I wish I was up air higher. I put tinted plexiglass in the windows to cut down on deer seeing inside. The vertical windows are 10"x30" to shoot a bow out of that I build myself and swing in. The other two on the front are just to see around the plot easier and move less trying to see everything through the vertical windows. I have a door on the opposite side with a set of stairs.