As I understand it, all Presidential Libraries before Clinton were built with Public Funds. Thus President Bush, unless, Congress changes the law will have to raise the cash for his own Library.
What are the chances of Congress passing a bill to save President Bush from having to raise his own money for the library?
I don't know if the other universities have also begun seeking funds, but the rough estimate is said to be around $300 million dollars. (Baylor plans to donate the 100 acres it has targeted for the site.)