I have several houses now and I'm only allowed 150 items in my backpack. There is at least 1 thing I like in all of my houses so I won't just delete them but I was thinking that it would be nice if I could gut my houses and redesign them to one type of house completely different. Like, I would guy out the banquet table from my winter house and gut my Apollo maze and it's underground house. I would guy out the rocky horror show plant from my garden house and put it in a smaller room but use the gardens entire lot layout to rebuild my new home. Then I could add my dungeons and all the free loot items (my fishbowl, giving tree, mine etc) to design one master house that has all the things I like together in one place so I can delete all these houses and only carry one.
It's probably wishful thinking but I really wish I could do this.