I was thinking, What if you add the option to buy pillows?
You could have a few sizes, some small square ones for like couches, some normal sized ones to replace the bed pillow, and maybe even a body pillow, they could work similar to the rugs, where there are a few pre-designed ones, and then a custom one for people to upload their own textures.
And as an incentive to buy one for a purpose other then decoration, you could make it so sleeping near one increases the sleep regen rate, does not have to be anything crazy, like 1% or 2%, enough to give you a reason to buy one, but not enough to make them overpowered.