At 1-2% savings of water thats roughly $20M–$40M/year on 2M AF of throughput using the 2024 SWP as base reference for volumes + 1000$/AF.
Though I think saving water in drought years has a massive value that isn't properly measured in this calculation. Likewise in boom years saving water almost doesn't matter.
See what the proposals come in as. See if the politicians turn it into a jobs project for the interior...