We have company in our area that makes pipe frames for buildings and other things. KLENE Pipe Structures. I read about it in Mother Earth News and then found he was 15 miles away in Greensburg IN. They appear to be just a heavier version of the pvc ones. These are built for farm use. I would think you could assemble it and then cover it with a tarp (roof and/or sides) when the tarp showed age you could replace it. If you are worried about wind use an anchor for a mobile home or a dog tie out. This structure would be portable and could be disassembled easily.