Lisa Catalano believes in love ad first sight.

The Bay Area singleton, 42, is spending cold, hard cash to rent a dozen digital billboards along California’s famed Highway 101 — advertising her hand in marriage to any commuter that’s ready for commitment.

“I’m putting myself out there,” Catalano, a vintage clothes retailer, from San Mateo, Calif., told the Post with a laugh. “People would be shocked if they knew how much this is costing me.” 4

Catalano, who launched her ad campaign on September 2, chose not to disclose how much the exploit has cost her over the past month.

But the wannabe bride-to-be means business.

“This is not a joke. It’s not a gimmick. This is a serious, self-funded endeavor,” she insisted. “I just want to find my husband.”

Catalano’s ad campaign — spanni

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