It would be nice if you could decorate 1 room or part of a room and store that setting with a mention of all the items in that setting (with a screenshot next to it if possible).

That way if you gain access to a house you could go to this saved decoration layout and "autobuild" the stored layout using the items in your inventory (only would work if you have all the items).

This system should allow you to add multiple of those stored prebuilds at the same time until the max amount of allowed items is reached. That way it would be very easy to re-decorate after relocating your house or when you happen to have moved servers.

It also makes it a good option for housing decorators who charge money for it because it would allow them to do it for you at a cheaper rate and allow you to choose what you want to have in each room or corner.