I hear you, I talked my wife into letting me get a 2,000 cigar humidor cabinet, and saying this is more than enough room for me. I got that last November, I am already tossing about the idea of getting another one, purely to age boxes in, (the one I have now, half is used to box age, the other half has cigars loose) I am trying to be tactful about it, making it sound as a joke at first, but keeping it in the back of her mind, so I can slowly work on her, but I can't be too slow about it, the cabinet I have now is overstuffed, I still use three regular humidors for odds and ends. I also don't like that I can't buy cigars at will anymore since I don't have the room, my theory is, build the humidor and the cigars will come.
My other theory is, 20 years down the road you never know what the state of cigars and the law will be in this country, in the least I see more and more taxes, so again, best to be prepared.