I love the idea!! I have one that I am building now using repurposed sheet metal just like what you used for the roofing. just like you I hate working in the heat so I am going to have to put off finishing until this fall. also I have a barrel stove kit that I use to heat up my house and I ABSOLUTELY love it. thanks for the great videos and check my site out as well. I have lots of video that I will be posting of living off grid and homesteading!