If she goes to California, she will be returning to the place where she died.
It may not be a bad deal at least for a time being.
I am pretty sure that the state of California didn't pay for the expenses.
It probably is a commercial deal involving private funds.
Nobody can say anything if it's a business deal belonging to the private sector.

I have a feeling that it may not stay in California very long either.
The sculpture probably will be removed forever in the respect of Marilyn Monroe
because the people in California are not much different from those in Chicago.

Just my guess, 2 cents worth.

How dare they did to you, MM?

Come to me. I'll keep you - Forever
like your photo looking out of the Manhattan hotel in white bath robe.

You live in the wrong era - Era when Innocence Lost.
Come to me, MM.