Dennis D
I have not built one yet - but I will. Cost Centers are: cool bot, air conditioner, door, some framing, some sheeting, insulation board, wireless thermometer, light and caulk / tape.
At first I thought I was going to build a 5 by 6 or a 4 by 6. Now I am going to build a 4 by 7 and limit the inside height to 6' 3". The 4 by 7 will allow the materials to work out logically.
I am not going to hang deer in mind. I will have a wood floor over my insulation. The door - I may buy an exterior door but I might just build one too.
The people at cool bot have been super to communicate with and answer my questions in record time.
If a person cuts corner on insulation you are handing too much $$ to electrical cooperative. I am storing chesntuts, sawtooth, and other nuts. I am going to be growing DCO as they put down their roots. I will store bare root and scions in mine on a limited basis.
I am definitely sheeting the outside and likely will sheet the inside also.
I can buy a new air conditioner for $300 rated for 10,000 BTUs that will work with their cool bot.
I am concerned about building it so it works properly and is not an energy hog because the AC and insulation are a poor fit together.