What is the best prefab workflow in UE4?

The main problems to use the blueprints is:

  • The prefab have internal Blueprints.
  • The BSP brushes & the collisions brushes.
    The objective:
  • Is create a prefab with the house (and i need create more than one, because i have multiple houses to use) like a Blueprint but with BSP & Collisions support
    and is only to place in the maps (static & dynamic).
    A similar example is in the Shooter Demo or in the UDK or UE3 look in the maps the layers/channels/levels (the light map, the main struct map, the collision map) then the idea is create the houses as maps and then use the maps of the houses like a Blueprint in different levels to place the houses.
    *And i can’t convert the engine collision brushes to a Blueprint and i don’t need the Blueprint Utilities, only place the houses at create the levels in the editor more or less like the Shooter Example.

This hit the performance or will give me a problem ?