Your network isn't just who's in it, it's who holds when things go wrong.
I've watched deals with solid fundamentals fall apart because of one broken relationship at the wrong time.
Not bad underwriting. Not a bad market. A person who looked reliable until the deal showed weakness, and then made decisions that protected themselves first.
This is the part of network-building nobody talks about directly. Everybody says "your network is your net worth" and moves on. What they don't say is that some networks are cannibalistic. They function fine when things are going well. The moment vulnerability shows up, certain people in that network stop being allies and start being opportunists.
What I've learned after three decades: the question isn't who's in your network. It's what those people do under conditions that aren't ideal. You need to know that before the moment arrives, not during it.
A few things that have held up for me over the years:
Trust is earned in smaller transactions before you put it to work on bigger ones. Watch how someone handles a problem in a deal that isn't yours. Pay attention to what they say about other people when those people aren't in the room. That tells you more than any track record summary.
Redundancy matters. One reliable GC, one reliable lender, one reliable partner, that's a single point of failure. If that person is unavailable or has their own issues when you need them, you're exposed. Real network strength means you have multiple people who can fill each critical function, and you've already worked with them enough to know they'll deliver.
Size is irrelevant. The investors I've seen consistently execute over long periods aren't the ones with the biggest contact lists. They're the ones who know exactly which five or six people they'd call in a crisis and have a backup for each of them.