Raised floor, extra space on top, and a pull out bed underneath! Maybe try this to have a guest room/office or playroom?
20 Tiny Bedroom Hacks Help You Make the Most of Your Space - "hide the bed" -# 8 or 9
These space-saving beds from Canadian CabinetBed, Inc are a perfect addition anywhere you need an extra bed but are limited on space. Living in a shoebox