Maintenance experience? No, but they do take part in
beauty contests.
Tactical jets are going to be expensive to a private owner no matter what the type, but the relative simplicity and availability of the Hunter and Skyhawk is going to make it a lot less expensive than other comparable types for a private company to operate. The availability largely comes from several countries who operated them for a long time while maintaining them
very well. The Swiss didn't retire their last Hunters until 1994 and the Israeli's still fly A-4's, though they have gotten rid of the bulk of their fleet since the 90's. The same with their Kfir's and Swedish Drakens, which were specifically designed to be simple enough to be maintained by conscripts. All of those countries did, and still do, an excellent job of maintaining their aircraft. Talking to the Grumman guys in St Augustine they said the F-5's we bought back from the Swiss were in better shape than any Navy ones they had ever seen.