[quote=@ERode]
Is this going to function as a Nation RP, just with houses instead of nations? 
[/quote]

Not really, no. Essentially, while the entire thing is large-scale, not everyone will have a house. There are open houses for player backstories/if people want to play a lord. They also don't have to be as developed as the GM-made houses.

The focus on the RP, in the end, is on the player characters and their development.