When it comes to equipment, I think most homebrewers either like to go full DIY and design/create for themselves, or they're looking for something to make their process easier and "just works" right out of the box. This seems to target a middle area in between these two groups, and I'd have some concerns that there wouldn't be much interest in this type of kit.
Also, the chiller market can be rather competitive as to what works the fastest. For the price point you're listing, I'd want to see some real world numbers for how fast it can chill 5 gallons of beer down to pitching temps.
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