New Theater Construction

[Beta Man]

What is the most economical way to build a three car garage with a space above it that is large enough (in ceiling height in addition to Length/Width which is the part I'm not worried about) for a proper theater.....

Basically, what "type" of structure, such as roof pitch/design etc.... My contractor told me Dormers add very little space (which makes sense) but add quite a bit of expense, So I want to know what basic shape etc. a garage with a large finished space above it should be..... When looking at the garage, it's going to have to be wide, and can't be 2 cars deep (due to where it is on the property)

My contractor said that the overall height of the garage is probably dictated by a formula based on the square footage of the home on the property, so he expects that we could build "up" quite a bit..... but building up may add a LOT of cost, so I need to find an efficient compromise.

This space is not attached to the house either.... in case that matters.... So simple colors and a few details should help match it up to the house.... so we don't need to go over-board with detail work.