PSA: You don't need servant coffins to upgrade your castle heart in V Rising

So, you're playing V Rising for the first time. You've got yourself the foundation of a nice little vampiric castle on the go; plenty of crafting stations, resource refineries, and maybe even a little crypt where your coffin is securely stowed. The problem is you're struggling to upgrade your castle heart through the main tutorial questline.

The Expanding Domain quest tasks you with levelling up your castle heart from one to two, but when you look at the heart, it seems to require four servant coffins and 50 floor tiles.