Where should I put all these books?

I'm planning on opening an antique bookstore in the future, but because it will be in the future, I of course do not have a store yet. The thing is I've been picking up books wherever I can and I've been hitting way more deals way faster than I ever expected to! It's WONDERFUL but where in the hell can I keep all these in the meantime?? I'm going to have a store's worth of very valuable and delicate books in my tiny apartment! Can someone please help me think of somewhere dry and safe for them? Thank you so much!