Multiple Database, one Theme Drupal 7

I have a cored Drupal Installation, that is where I have programmed my entire website. I would like to create multiple databases for the purpose of creating LANDING Pages only. For example: Database 1 - Core Drupal Database 2 - Only landing Pages Database 3 - Only Landing page I can't use one database, as the size would get too big. I need to create upto 10 gbs+ of mysql tables So, I want a custom module that will allow me too: Assign Content types to Databases. For Example Content 1 --- Associate with Database 1 Content 2 --- Associate with Database 1 Content 3 --- Associate with Database 2 Should I decided to change the theme, the them would change universally across all content types. The only thing that is different is where the data is stored.