What is the opinion of Reddit about the
Royal Brew Nitro Cold Brew Coffee Maker Home Keg Kit System (Matte Flat Black 64 oz)?

I went down a similar path, with nitro cold brew coffee (not sure if you’re just doing cold brew or nitro as well?).

It turns out that there are keg systems that are not terribly expensive. The only thing that’s annoying is they all support the cartridge-style N2O containers, which get expensive fairly quickly. But compared to how insanely expensive canned nitro cold brews are (like $2.5/12oz can on average!!!) you’d make your return in like….2 or 3 months.

https://www.amazon.com/gp/product/B07SB2K1C6/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1

No experience with it (and not sure what your budget is), but Royal Brew keg shows $149 on Amazon plus a $20 coupon.https://www.amazon.com/Royal-Nitro-Coffee-Maker-System/dp/B07SB2K1C6