The site visit is where a budget survives contact with reality. On paper a venue looks perfect: the square footage works, the photos are gorgeous, the room holds your guest count. Then you walk it, and the only power drop is a single 20-amp circuit behind a locked panel, the freight elevator is out of service until August, and the gorgeous atrium ceiling has no rigging points anywhere near where you wanted the banner. None of that shows up in a floor plan.
A good producer treats the walkthrough as a data-gathering mission, not a formality. The goal is simple: leave the room knowing exactly what you can build, what it will cost to power and rig, and where the timeline is going to fight you. Here is the checklist we run on every site visit, and why each item earns its place.