Sue Skube of NAMI-SD told City News Service organizers are hoping for another 100 or so ticket sales, which begin at $50.
"We were hoping for about $50,000 net (proceeds) and we're not about to get that," Skube said. The goal was the total the inaugural event collected last year, she said.
The two organizations will split the proceeds 50-50, she said.
If they come up short, NAMI-SD might have to cut two part-time employees who make presentations at schools on reducing the stigma of mental illness and conduct other outreach activities, according to Skuba.
She said event organizers don't know why the ticket sales are coming up short.
The gala is scheduled to begin at 9 p.m. and will include appetizers, a no-host bar, silent auction, party favors and a midnight champagne toast. A VIP package begins at 7 p.m. with additional champagne and a four-course meal.
An 11-member band is scheduled to perform until 1 a.m., according to organizers of the gala.