What is best practice depends upon what you want to create.
There are two ways to geo-locate the model: Add location and Set Manual Location
You say you use Add Location to geo-locate the model, but you don’t say why you use that method.
Is it necessary to have the GE terrain in the model?
Either way you can have the building aligned with the global axes while maintaining the proper relationship of the terrain and true north.
Explain a bit more about what you want to create and we’ll be able to explain how.
Solar North — Extension Warehouse
Provides tools for you to set and display the solar north angle.