You typically cannot use donated funds to create a quasi-endowment. Those are generally restricted to expended budget dollars, excess revenue, and undesignated bequests (if you have a policy for those).
Donors must approve a repurposing of their gifts. But, again, not usually to a quasi.
You should seek guidance from Counsel!
John
John Taylor Principal, John H. Taylor Consulting, LLC 919.816.5903 Big ideas; small keyboard