An oak magic wardrobe flatpack can be made at a workbench (Oak workbench or better) in the workshop of a player-owned house. Like when making the normal Oak magic wardrobe, this requires 42 Construction, uses 4 oak planks and gives 240 experience. The flatpack can then be used on a magic wardrobe hotspot in a Costume room, either in building mode or not. This requires no Construction level and gives no experience.
The cost of making and selling an oak magic wardrobe flatpack from scratch gives a profit of: −2,175