Remove the core of your Paracord (you need 1.5x of Paracord to wire length about (depending on wire thickness)
Sleeve the Paracord over your wire. That’s the hard part. (My trick has been to solder a length of thick magnet wire to one side of the wire and use it as a needle to guide the wire down the sleeve.
Add all the heat shrinks and connector sleeves you need
I do sell them so yes. There is a some profit, but the margins are slim. I just really enjoy making swag cables.
Do you make any A/V or data cables?
I make 12G 4K BNC cables too as well as focus motor cables. I can make USB cables but haven’t done any yet.