Any home interior contractors on here?

I'm remodeling one of the rooms in the house. It's time to hang the crown molding, but I have a few questions.

First, let me state, I don't have a compound miter saw. This is all being hand cut.

Can I miter and cope only one end of each interior corner molding and butt cut the other end or does each end have to mitered? There's one exterior corner in the room where the wall juts out six inches for the room's door.