Yeah, Minecraft has always been one of those games I spend more time modding then playing. I do the same with Sims, but I don't think the mods are nearly as game-changing as Minecraft mods.
The first one being like a property manager simulator game does sound pretty interesting. Sounds like it could make good use of a morality system too. Yeah, it's pretty surprising that I can't think of any games that really match with that game play.
I like RPGs too, but a lot of them fall off after 10ish hours. I've had so many that start out really interesting then I start realize the word isn't nearly as diverse or detailed as it seemed at the start.