I would disagree here, I also believe it can be home made very cheaply and I don’t see why you shouldn’t focus some attention here considering how important Co2 is.
I just started this topic.
Also… Your setup sounds Awsome. Mind sharing some pictures?
I would agree to this statement, keep your VPD in check focus on your temps being around 27*c, ensure you have good DLI ratings, and work on the Co2 challenge because that will be your highest gain at low cost.