He doesn’t have Secret Service. Each department has executive protection functions.
In any event the cost is not inconsequential.
GO HERE FOR DATA AND LINKS
http://sunlightfoundation.com/blog/2012/11/14/john-kerrys-influence-profile/
<><> Mentions of Kerry in Foreign Lobbying Records
<><> Contributions to Kerry's campaign committees by legal
and lobbying PACs and individuals