The Garden Igloo Kit. in a few different versions. could be a greenhouse +/or alternative to tent accommodations to house a few more summer retreatants. not particularly cost effective though, in my humble view.
Use drop cloth for shade. Wonder if it might get too hot underneath. If the balcony wasn't deep enough (as above), would have to have poles attached to the ends of the shade or I would keep hitting my head - very annoying. Like tent ends with huge eyelets.**