3) is underestimated. A typical shipping container is 40 feet long, so I think they ship a 32' not a 24' one. Also, 4' centers are necessary in most parts of th

3) is underestimated. A typical shipping container is 40 feet long, so I think they ship a 32' not a 24' one. Also, 4' centers are necessary in most parts of the world: 6' will collapse under snow load in half the US. That's $600, not $400. The benches shown are at least another $400. Finally, the most expensive part of a greenhouse is the endwall and the plastic; probably +$500, making it $1500. (I am a small farmer with a side job in tech.)