Found a new tool on Amazon for helping managing headless systems: ”#Dopesplay Portable #Lapdock”. Not the cheapest at CAD$415 but includes an HDMI monitor, USB-C keyboard/trackpad and battery in a laptop-like case. Plug in the HDMI and the USB to the headless system (I tried PCs, Macs, NAS) and you have a working portable #KVM . It's not perfect -- no VGA support for the older servers, but so much better than dragging a crashcart around with monitor and then trying to find a power source.