Looks like a pretty neat conversion for an ambulance. Bet it would tow good.
http://richmond.craigslist.org/cto/2871934726.html
http://richmond.craigslist.org/cto/2871934726.html
I could see a short bed sliding 5th wheel back there. The auto slide one like http://www.rvstuffusa.com/18kautomaticsliding5thwheelhitchbyhijacker.html that one