Here is an idea of trading shops that could be applicable to BMM installed on the front part of the vessel. Placing the shops in the front would also refine the rear of the ship and avoided the whale effect of the silhouette of the latest concepts. The principle is to be able, when one is in space, to have access to an aisle of several shops visible from the trading room. And when the BMM is placed on the planets or the air is breathable, to go down through the shops you have selected according to your stocks or the number of potential customers and thus allow to have a real market directly accessible from the soil with all the benefits it brings. Indeed, this system avoids boarding the BMM all customers or for example to keep in the vessel that luxury shops or contraband accessible only to a few customers.