Here is the best I could find regarding what is needed:
https://www.fox6now.com/sports/brewers-amfam-field-needs-428m-worth-work-over-20-years-study
if the state pays this, that state of the art clause should be removed and the leases extended as start of concessions.
Also, while not realistic, if the state could sell the stadium to the brewers after the repairs are done, that would be ideal, but again wont happen, because the brewers deal is pretty sweet.