I wonder if the cost can be cut by replacing computer part with ESP32 at the cost of losing .iso mount and video input quality, and at the same time take out SD card anxiety. The only problem is difficulty of getting framebuffer cheaply, I think.
But it's also bloat on a rescue device. KVM has to and only has to work when a remote computer is unable to come back online, no need for computing power or app marketplace to fix that.