An 11-device-in-one system (which can be used as 360-degree-rotatable rollable portable lockable collapsible expandable carport, green house, gazebo, storage, attic, awnings, tent, workshop, outdoor tables, booth, and RV port) comprises: round bars; square bars releasably attached to the round bars; 360-degree rotatable lockable wheels rotatably attached to the round bars; canvas roof panels; canvas side panels; canvas end panels; canvas gap-covering panels; panel-lifting VELCRO (hook and loop fasteners) sewn to the side and gap-covering panels; panel-sealing zippers sewn to the end panels (for forming doors); panel-sealing grommets attached to the roof, side, and end panels; bungee cords and balls inserted through the grommets (for attaching the roof, side, and end panels together); first telescopic arms foldably and releasably attached to the round bars; second telescopic arms foldably attached to the first telescopic arms; feet welded to the second telescopic arms (for attaching to each other over the roof panels to form the frames for booth signs); and toes welded to the round bars (for releasably locking the feet thereon to form the frames for awnings and tables).