$40k with a sponsor I met at a conference. Two updates in three years.
This one is closed now, or at least my money came back, and it came back at 0.94x after three and a half years. So I lost about $2,400 and three and a half years of anything else I could have done with $40k.
What went wrong wasn't the property. It was a small self storage facility in a secondary market and it performed roughly okay from what I can piece together. The problem was that I never actually knew what was happening. Two updates in three years. I emailed maybe nine times. Got answers to three of those emails. When it sold I found out from a distribution notice, not from a conversation.
The step where I went wrong was the very first one. I met this guy at a conference, he was impressive in the room, he had a deck, and I wired money to him about six weeks later without ever speaking to a single person who had invested with him before. I did read the docs. The docs were fine. That's not where the failure was.
What I'd do differently: before wiring, get names of prior LPs and call them, and specifically ask how often they heard from him and what happened when they asked a question. I think that one screen would have caught this.