Some facts for you:
In the private sector, the wedding industry could grow by more than $16 billion if gay marriage were expanded to all 50 states, according to a 2004 study by Forbes magazine. ... Critics suggest that same-sex marriage would create new burdens for companies by expanding the list of employees for whom they would have to offer spousal benefits. But research has indicated that "such coverage only adds about 1 to 2 percent to companies' healthcare costs," according to a 2004 online article for Workforce Management.