That was an easy one Stuart, written in a language we are familiar with. What was your last name? ;)
"The basic projector is a complex configuration of a beast in the way it is setup, and not conducive to cheap mass production?"
The design of the upgradable projector over many parts and display mechanism, makes it difficult to mass produce as cheaply as a all in one 15 foot unit using a cheap display engine setup? Cheap production being in the $2k range.
Luv stumping engineers with English! ;)