I believe they both are - at least in part:
The cost, which was reported by the Las Vegas Sun from stadium authority documents, comes from $850 million provided by the Raiders, another $750 million from public funding, which are the county's hotel room taxes, plus $200 million from the NFL's "G4" loan program.
Los Angeles Rams owner Stan Kroenke and his wife, Ann Walton Kroenke, are investing $1.6 billion in the team’s new Inglewood stadium, a project that now costs in excess of $4 billion. The information was provided by finance sources after banks met earlier this month to arrange a $2.25 billion loan for the construction.
Let's hope Stan and Ann feel the need to sell Aubameyang, Lacazette and Ramsey to help finance their LA Rams investment