Murphy bed idea for guest room, but add second "foot" that turns into desk further down the bed. Store work items and craft items in cabinet. Also, embed lights in top "foot," to shine down on desk, just like ones that shine on bed.
Storage beds made from old kitchen cabinets with a secret hangout spot. Want this for my girls when they get older! Better than bunk beds! The secret hangout spot is great, wish I could fit in it myself.