Assets should be "owned" by "Custodians" in the public interest, because ideologies of local government change, and, therefore local government can't be trusted not to sell off the Crown Jewels, while the private sector can't be trusted not to melt them down and sell off the precious metal and gems...

"Melting down" being very much to the point...

It's then a simple matter for the funders and users of funding to form a partnership and agree a reasonable rate for whatever needs doing.

"The future is already here -- it's just not very evenly distributed" William Gibson