While Colorado lawmakers were pondering civil unions in 2012, UCLA's Williams Institute researched the potential economic impacts.
The study finds civil unions could bring Colorado almost $5 million in three years. It looked at the 2009 Census and compared Colorado with states that have already enacted same-sex marriage and/or civil union laws.
It predicts 28 percent of same-sex couples will commit within one year, spending money on ceremonies and licenses. Both, the study predicts, will impact revenue for the state.
But Rev. Wes Mullins says not all same-sex couples will take the plunge with civil unions.
"While people are excited and happy about it to have rights at state level, there is a level of dissatisfaction with the 'separate but not equal' option," said Mullins.
Mullins says the founder of the Metropolitan Church is among the plaintiffs in a U.S. Supreme Court case challenging the California ban on same-sex marriage.
Last Thursday, Gov. John Hickenlooper signed Colorado's new law, clearing the way for same-sex unions.
Mullins says his church is planning to hold a mass civil union ceremony on May 1st. It will be on the steps of Colorado Springs City Hall at 6 p.m. He doesn't know how many couples will plan on attending.