I never did any serious homework on the benefits of the paid sync method. I just set up a git repo and some keyboard shortcuts to make light work of running git commit/pull/push.
You might like my latest little home network project actually @Belfry . I recently bought a MikroTik hEXs, and i’m very very happy with it. I’m a bit angry with myself for thinking that what is available via retail channels defines what’s available. I should know that i’ll want more from a gadget than that 
Anyway, at the same time i got into Obsidian “bases”. I’ve created one page for each of my network devices. Here’s roberto for example…
The names of those properties are a little terse, but that’s because they are being used by a script…
“Bases” lets me manage this stuff as a spreadsheet. The real benefit was that i wrote a netcfg python script for myself. For both DHCP and DNS i’m able to get a list of what’s “intended” (ie, what my obsidian notes reckon my network should look like, and a list of what’s “established” (ie, what is actually on my network.
Now that i have a grown up router, my python script can ssh onto RouterOS and get a list of DHCP reserved addresses. When i align that with my “intended” list, i can then issue a bunch of insert/update/delete statements to align my router’s configuration with my Obsidian documentation.
DNS is similar, but a) i’m using Linode’s API, and b), i’m only updating A records if the hostname is already registered in my domain.
There’s a bit more going on, but those are the highlights. I was really rapt when i flipped my network over from my crap Deco mesh managed DHCP reservations, to Mikrotik with the five Deco devices in access point mode. I snuck in a shift from a 192.168.68.0/22 to 192.168.88.0/24. I also renamed my new wireless network name to the old name with the same password and avoided re-pairing everything again.
So, i’m not sure that Obsidian is the tool for a job like this, but i think it’s kind of nifty to be driving my network config from where i keep notes on these hosts.
Anyway, i feel like this now that i have a big boy router…