It would be nice if my dorm and various houses had craftable portals in them that could be used to go to my other houses in the same way that the great spire lets you choose which world you want to enter. This way I could just click on the portal and see a list of my houses and be able to teleport to which one I want to go to without having to change houses on my character sheet. This would also allow my guests to see all of my houses at thier leisure without me to personally take them to each one individually. Any house with a craftable portal in it would be included in your port to housing list. If you don't want a house on such a list, you simply don't put such a portal into that house (really nice if it isn't yet done).