Smart! I’m betting it works well.
I think this is a good small garden idea for brussel sprouts, which grow to about 24-36" tall which makes it hard to use regular garden fabric or a low tunnel in the smaller 6' long raised bed frames I use. B. Sprouts grown in the open take a long time to mature, and by the end of the season they are usually damaged by cabbage loopers even if you spray with BT or spinosad every few days. I have avoided planting them and cabbage for this reason.
If you were are a small farmer growing cabbage or brussle sprouts you will probably have long straight rows of sprouts that are easier to cover with an 82" x 100' roll AgriFabric or Reemay, and probably have someone to help you to cover your crop and secure the fabric. (If you are growing in quarter sections you probably just regularly spray the crap out if it with BT and expect a 10% crop loss!)
COST; I can use the netting multiple years. The cost of the netting was about $13-$14, about the same as 16 oz of BT spray which I would easily use in one year. Other things needed: Two 48' metal support stakes at either end and a 72' metal stake to act as a mast in the middle. A couple of gallon plastic pots on the stakes to protect the fabric. about 8' of paracord for center support. Stakes; Clean them at season end and reuse multiple years.
I have 7 plants which will be about all the choux de bruxelles I will be able to enjoy this winter!