Me personally I would make it because its just a few bends and welds. If theifs are a problem then I would do some chainlink with razorwire around it. I hope they are not though.
The pic above my comment shows them covered in plastic. That's ok for some areas,but july and augest your gonna want more breeze through the sidewalls. You can do a 2/3rds cover , leaving the bottom 3rd open,with clear greenhouse plastic, a couple 2x4x? And the appropriate hardware to hook it to the frame. This will help with humidity problems because your not getting water on your plants or in the area directly, just the 100gal fab pots and your foliar sprays.
I would also look into a shade cloth for them hot high summer days. Working out in other greenhouses in july aug has made me appriciate the power of a shade cloth.
Best of luck, but you seem like you know what your doing