If player have much money he can invest it in his own studio. Studios in MB allow the production of several films at the same time.
In addition to several studios which are accessible for each player. There is a possibility of building, upgrading or modernization of its own studios.
Building studios can increase the number of produced films at the same time. In addition of costs it requires also some period of time.
The newly built studio is always the lowest level (Children Workshop) and only to those can be used during production (of the second film). If a player wants to have more advanced studio (offering better special effects), it must be modernize (which, of course, also costs time and money).
Upgrading studios means improvement of the selected capabilities without the need of upgrading to a higher level. You can expand the studio to reduce the time of production or reduce their cost. The higher the level the greater possibility of its upgrade.