It's a nice romantic idea to have a train store. A store, mainly O scale, if not exclusive, that has coffee available for customers, who like to hang around and meet. Maybe have group workshop sessions/presentations. And, also have a big in-store layout. I think a lot of us would love that.
Then reality hits us. Startup capital, expenses, warranty repairs, accounting, online-presence a must, competitive pricing, low-income, long hours...