Late medieval / early modern Genoa is an example of government services "owned" and budgeted by private investors. Historian Matteo Salonia, a lecturer at King's College (London), broke new libertarian ground with his recent book, Genoa’s Freedom: Entrepreneurship, Republicanism, and the Spanish Atlanticby Matteo Salonia (Lexington Books, 2017); 214 pages.  I was delighted to write a book review for Future of Freedom Foundation.
I encourage you to explore some of his remarkable findings in the following sources:
Future of Freedom Foundation book review by Lawrence M. Ludlow
Tom Woods Show interview
Matteo Salonia's book:


Alex R. Knight III's picture

I recently ordered Edward Peter Stringham's book, Private Governance.  I'm hoping it'll be pretty good; Carl Watner of The Voluntaryist calls it the perfect companion volume to his essay anthology, I Must Speak Out.