Many theatres will do the infrastructure move first them buy the gear to fill it. It happens all the time with fly systems, sound systems, and lighting systems. However, in order to do that a plan needs to be put in place which it was not in this case. I have spent time as a
TD at a performing arts magnet school with a new
theatre in this exact same situation. I have 192 dimmers in a black box space with 70 fixtures. The district had no desire to buy any more fixtures "because they spent enough already". After an initial large
purchase, very few school districts are going to want to dump more into the
venue, however little the amount may be. Usually large amounts of money are earmarked for a certain project. You usually get one shot at getting what you want. After that shot, the odds of getting any more money that usually has to come out of the general fund are nearly impossible.
I am used to working in spaces that have less then 100
dimmer and more then 200 lights. One of the spaces I am routinely in has 120 dimmers and 400 fixtures. Yes, you are not always going to use all your floor pockets or the 10 circuits in the
loge, but having 2 dimmers for every light you own is a
bit of a waste in a world were expansion is difficult.
How many people have worked at schools that had the "buy up" plan only to have that plan cut the next year because of budget issues? Get the money/gear now while you can.