I've enjoyed the contributions you have made to the Ruins mod, I wasn't planning on using the Ruins mod in my new pack as I have moved on to using RecurrentComplex and the ChocolateQuest mods. I may have to revisit including Ruins, I just thought it was redundant since the other two mods do the same thing.
If I'm understanding your version correctly, as soon as that one structure spawns, it would set the world spawn point to that building. What I'm not understanding is how would I make sure it generates when the world is created. Was there a spawn chance that could be set, so as to make sure that structure is spawned every time at the start of a world?