I had done something similar using Macs Symbolic Links, back when I still had mac computers, I had all my lightroom presets on a dropbox folder and sync them through Symbolic Links between both my laptop and desktop, whenever I created or changed anything on one machine it would update on the other as soon as it connectes to dropobox. . It has been a long time and I can not remember the exact procedure, you have to do it using terminal commands. I do not know if they still work on a new OS, but if you google Symbolic Links you may find it. Hope it helps.
Good luck!