I'm considering buying a lightweight inexpensive PVC greenhouse from that Amazing online store, primarily for starting seeds. I don't plan on keeping plants in it year round. Sounds like construction is doable, shelves are iffy so maybe reinforce. Strong winds are problematic for the greenhouse but would not be an issue here. I just really need to get all my seed trays out of the front room & this seems like a good idea for next year.
I've read all the online reviews & wondered if you good folks have any input.