The Most Important Character
Actually I love the idea and have done something similar on a larger scale which involved legacies and heirlooms and turned out very well indeed.
Also I’ve done many kingmaker/kingmaking games most of which turned out superbly. Of course I’m very, very old school and began with playing the very first versions of D&D almost at the time they were first invented.
It’s hard to go wrong with this kind of game, though this may very well be a generational thing (rebelling against responsibility and duty) with younger gamers.
Early on it was written directly into the recipe.
Also castles, keeps, freeholds, manors, etc. were all prominent in my games and always have been as a Dungeonmaster. As a player as soon as I could afford it then most of my characters bought land (or received it for services rendered) designed and built their own homes and fortifications. So as to have a personal and secure Base of Operations. I’ve even had several great adventures either assaulting/besieging the keeps of others or defending my own.