Your analytics cannot see the channel producing most of your tours
Brokers send links by email and text, and every one of those visits arrives labeled as direct traffic.
Look at a typical brokerage analytics account and direct traffic dominates. Not because people are typing the URL, but because the site is a document that gets forwarded. The result is a program optimized for the small share of visits that came from search.
Tag the links brokers send. A simple campaign parameter appended to building page URLs, built into whatever tool they use, separates a forwarded listing from a cold search visit and shows which buildings are actually being circulated.
Instrument the phone. Call tracking with proper handling of your published number, and a capture of what page the caller was reading. A large share of real inquiries arrive by phone and never touch a form, so none of them appear in a conversion count.
Agree definitions before touching anything else. What counts as an inquiry, what counts as qualified, what counts as a tour. Without that, every later measurement is an argument.