The omission is the data point. A sponsor who answers every question fluently but leaves a six-year-stuck asset off the track record is not hiding incompetence, he is hiding a specific fact. That distinction matters for how you approach the next deal.
The assumption doing the most work in most LP due diligence is that the materials represent a complete picture. They never do. The pitch deck shows selected properties. The question you want answered is not "tell me about your track record" but "send me a complete list of every asset you have ever sponsored, its projected hold, its actual hold, and its actual vs. projected return." If the sponsor resists that request or the list arrives with gaps, you have your answer without needing to evaluate the current deal at all.
A few other things to probe that most first-time LPs miss. Ask who the lender is and whether the loan is recourse or non-recourse, because that tells you something about the sponsor's credibility with institutional capital. Ask what happens to your capital if the pref is not covered in year two, specifically whether it accrues or simply lapses. Ask whether the GP has a promote clawback provision. The 70/30 split looks clean until the deal underperforms and you find out the GP already took fees on the front end that reduced the effective equity available for distributions.
The risk you did not mention: even good sponsors can be stuck in an exit environment that makes a five-year hold into a seven-year hold for reasons outside their control. Illiquidity in syndications is not a worst-case scenario, it is a base-case feature, and $75k locked up longer than projected has a real opportunity cost. That cost should be priced into your decision before you wire.
A licensed securities attorney should review any offering documents before you commit capital. That is a one-sentence point and then move on.
What did the Columbus deal docs say about the GP's fee structure, specifically acquisition fee, asset management fee, and whether those were calculated on committed capital or deployed capital?