Thank you so much for your kind reply. My app has different database connections between the customer facing app and the Admin app, but both app are running on the same application and the domain, just differentiated by layout and authentication. Rails has been very helpful in keeping the engineering team small.

I really like your versatility of different structures, which I need to study more to accurately comprehend the each designs that you mentioned, and certainly Drifting with Ruby helps me to learn more!