Supporters of a proposed NFL stadium have whittled their list to two sites just west of the Las Vegas Strip and will refuse to accept any less than $750 million in public funding toward the project.

The group hopes the stadium will be the next home of the Oakland Raiders.

Representatives from Majestic Realty and the Las Vegas Sands casino company updated an oversight committee Thursday on their quest to build a 65,000-seat domed stadium. They said the price tag continues to rise and is now $1.9 billion, saying they'd walk away from the project if state lawmakers don't meet their minimum financial demand.

The Raiders have made little progress securing a new stadium in the Oakland area and have committed to lining up $500 million toward building a new one in Las Vegas. Any team relocation needs the blessing of three-quarters of NFL owners, so developers are rushing to prepare their pitch by January, when the owners next meet.