you can always decorate the inside. I'm planning on easy wipe down vinyl mosaic tile effect for the kitchen area, maybe some sort of vinyl wrap if I need to for other large areas inside, although by the time you have cupboards, switches, panels etc how much wall space will still be visible is debatable. And i'm thinking of running most of my wiring flush on the ceiling, then putting old school automotive head liner and thin foam over coroplast panels velcroed to the ceiling to give a more sound-absorbing surface but which will still give me easy access to the cabling if necessary....