>>1683586Just a few cross braces using 2x4s should be enough to make them far more stable in wind. Just put them around all walls. Also, a cross cut saw from a hardware store is hardly any cost at all.
If you use the piping instead, make sure to sue the grey color conduit pipe or the black pipe. The grey stuff will be longer and sturdier while the black stuff will be good for low tunnels. White PVC gets brittle in the sun if you don't paint it.
