So something like this, where the bed is now - but with the headboard turned into a storage shelf (your dad could do that) so when the bed folds down, the pretty headboard you are using now aligns with the top of the mattress.
Sans the branch and crystals, ideal for lighting the dome. vintage wooden ladder makes great lighting! This one is wrapped with globe lights, and decorated with vintage chandelier crystals and branches. There are endless variations on this theme!
::: DIY : barn doors ::: Instead of buying an expensive barn door track kit, make one yourself. Fifty-eight dollars worth of hardware—including casters and plumbing pipes—transformed two salvaged 10 dollar doors into a barn-style entry.