It might be a good place for Tillandsia ( air plants). As long as it gets bright filtered light. Easy to care for. Just google caring for them.

first of all, Thank you guys for those valuable inputs. yes, as far as cleaning goes, its just been finished installing and I have asked them to clean them up. And also, I observed that the frosting on the glass didn't look that good, so I am going for the filming on certain portions of the doors n windows. - Is there a particular quality of films that I may choose for this ? - Yes, lighting is definitely the criteria I had in mind which can bring up the finish to this. And i am worried about this , as I did not go for False Roofing, bcos the ceiling is already at a low height. I should really refine my ideas on the lighting part. - the stairs are floored with white Marble stone..My mom loves it and the matting on it might hinder its beauty, but yes I will surely consider that as well. Thank you again.

Must be anchored in a planter box and placed on top of my flat-roofed garage

Can you please elaborate...what exactly are you looking for? And where are you planning on keeping your study table, I don't see one right now. Also, what's your budget and are you open to some carpentry renovations?