My wife and I are taking the commercial plunge. After running a successful backyard hybrid system for a year, we purchased 4 acres and moved. We have 3 quotes for high tunnels 30x100'. There is 2 steel barns on the property located in growing zone 6a. We plan to use half of one of the barns for a fish house and build a double skinned high tunnel behind the barn east to west.

I was reading that if I expand the size to 130' it will only cost me an extra $1500 initially, but with the…