We had to move my non-ambulatory[1] father from Mississippi to Virginia a couple of months ago. The vehicle probably didn't have all the staff and equipment of an ambulance but it did have an RN, a crash cart, and some other expensive crap that goes "ping". The cost was $3K for an 800 mile trip (slightly more because I included the "snacks and a DVD player" package).

[1] Oh, holy crap, I just got why ambulances are called that