DD1 at university. DD2 now has her room. DS1 has other room. No option for sharing as rooms all over 16 and all very precious about privacy and alone time! Also loud gamers 
Downstairs converted garage currently dumping room. Planning on turning it into office room and want to put a bed in there for DD1 with storage for her remaining stuff. Sofa bed not really the answer as it won't be used as a sofa very often and will take up a lot of space in what is a reasonably narrow room. Have looked at the beds that you attach to the wall but they are quite expensive.
I don't know if I have explained this well but does anyone have any ideas of any solutions? Thank you!