> I dived into the custom keyboard rabbit hole just 3 weeks ago

Take your time, the GAS is real and expensive !

All jokes aside, ordering small batches of PCBs is unfortunately very expensive, especially if you have a larger size.

If you ever feel the itch of going towards ergonomic split keyboards, you'll find plenty of ~40% splits that use reversible PCBs for both halves which allows for cheap batches. Typically you get 5 PCBs with JLC and that gives you enough to build one full keyboard for work and one for home.