This seems to be extremely similar to what I've been working on writing up (which I'm slightly salty about :D) and it's great to see this stuff finally getting affordable. My design using the same capture card and a 3D-printed enclosure set me back just under 25€ shipped, which includes KVM, as well as USB/IP, CD emulation and power control (not to mention that you can program it to do basically anything else).
I don't even know if anything like it exists on the market, let alone how much it might cost. Despite how buggy and horrible this kind of strange Chinese hardware is, it is absolutely incredible what you can accomplish with it.
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