Aloha Greg,
Great ideas, now you make me want to build a hoop green house with PVC Pipe using some of your construction ideas.
Will have to price out the pipe and joints. I will have to go online to see how to attach the plastic sheet to the PVC pipe. Maybe I could run a bead of glue on the outside of the PVC pipe and then stretch the plastic tight.
I know there are lots of ideas on youtube. Just have to make the time.
