I can, with full certainty, tell you that your "theory" of having run out of room, is scientifically, in accordance to the human condition; wrong!
All of humanity needs more and more orchids...some of us realize that....some of us don't.
At some point in your realization, you'll begin to creep around your house...inspecting sunshine as it filters through each window. You'll begin to wonder which spare room you can sacrifice to become your oasis of orchid climate. You'll sneak around the outside, imagining which areas would well suit your favorite potted friends. You'll rearrange furniture....and sooner more than later; You will be smitten. It's hopeless....don't waste the energy fighting it.