A case worth studying: buying a 1.5 MW colo as a passive hold and inheriting an operating business instead
A useful case for anyone underwriting a data center as a passive hold: a single story purpose-built colocation building in a secondary metro, about 22,000 square feet, roughly 1.5 MW of installed UPS capacity, 40-odd customers in cabinets and half cages. Marketed at a 9 cap on trailing NOI of about $378k, purchased at a $4.2m basis on the thesis that power is the constraint everywhere, the capacity was priced well under replacement cost, and the tenant base was diversified enough that no single customer exceeded 9% of revenue. Twenty six months later it sold for $3.35m. Where it came apart, roughly in order. Billable versus installed. Installed capacity was 1.5 MW. Billable kW under contract was about 640 kW, and about 180 kW of that sat on month to month terms inherited from the prior owner at rates set in 2016. The fill rate story was measured against a denominator that didn't actually produce revenue. Churn. Retail colo churns, and an 8% annual assumption looked reasonable in the abstract. Actual churn ran closer to 19% in year one, because three customers were mid-migration to public cloud at close, a fact the seller was aware of. Replacing a 12 cabinet customer takes a real sales function, which a passive owner focused elsewhere typically doesn't have in place. Capex. UPS battery strings at nine years, replacement quoted at $340k. A chiller with one compressor already down, running on the other since before closing, described in the mechanical report as merely "operational." Another $210k. Neither showed up in the original model at anything like that size. The utility. This is usually the decisive one. The whole thesis rests on selling additional capacity into a power constrained market. If the feeder serving the building has no headroom, an upgrade study can come back with a multi-year window and a cost allocation nobody wants to fund, which caps growth permanently below the scale wholesale buyers actually pay real prices for. The lessons generalize well. Underwrite billable kW under contract with remaining term, and treat everything above that as zero. Have someone who runs colo for a living review the customer list for migration risk before any diligence contingency comes off, since that review is inexpensive relative to what it protects against. And get the feeder capacity answer from the utility in writing before anything else, since that single answer can stop a deal like this in week one.