Wow #1: Cater to the client, and give him a taste of what he is investing in, literally. Perhaps serving hors de’vours (not something crunchy because he needs to hear what is being said and not the sound of his own chomping). This way he can get a sense of how people will be waiting on him hand and foot once he moves into the Veer Towers.
Wow #2: Creating a magazine that follows the presentation, so when the client leaves, he can always reference back to the magazine just in case he might have forgotten a point or needed clarification on something.
Wow #3: Add music and graphics to the presentation that are perfectly timed to the lecture part of the presentation.