Market for toilets: NYC marathon

Providing Toilets for 39,000 Runners

The NYC marathon is a peak load event:
"Gathering and placing 2,250 portable toilets for a one-day event — and then removing them almost immediately — is a daunting task. The marathon represents the third-largest annual assemblage of portable toilets in the country, behind the Rose Bowl college football game and parade and the motorcycle rally in Sturgis, S.D. Placed side by side, the 4-foot-wide toilets would stretch 1.7 miles. "

Apparently portable potties have a natural life cycle:
"The average special-event life of a portable toilet, Malone said, is two years — shorter if it attends a lot of concerts — before it is assigned to duty at construction sites, the “bread and butter” of the business. "