Mantis Audiovisual Universities and research institutes fit out rooms by the dozen, all to one spec, with every lesson recorded, easy to find, and easy to teach in.
Real projects, shown anonymized. Every client is under NDA, so you see the room and the outcome, never the name.
Thirty minutes with the engineer who would design it, not a salesperson. You leave with the drawing-stage problems named, the ones that are cheap to fix on paper and expensive once the room is built, whether or not we end up working together.
A handful of rooms are in design at any one time, each owned by the person who drew it.