This is what the nice command is for

I’ve been diagramming/documenting my network at work using draw.io, it is a little clunky but it works well for me, has good features and preloaded art for different types of devices.

Hot news, linux is incredibly compatible with printers. CUPS is very well designed. With relatively little technical knowledge you could probably plug a raspberry pi into virtually any old printer and get it running with the Pi as a print server sharing it with the network.