Some really cool ideas here, feels like I might struggle to present options and current base setup to the players though, so I think something with cards could work really well here, laying out the base like Betrayal at house on the hill tiles and keeping another deck where you can place upgraded versions of the rooms, maybe flip a card upside down to see the wreaked version if it gets destroyed? If I get a chance to try this out myself I'll absolutely let you know, but the current version is really awesome, you can see how excited it's made a base-builder like me :D