Thanks for the comments guys !
Still working on 2016 schedule and budget at the moment. Should be full season ELMS (except Imola), all European WEC races plus Austin and Bahrein if I get the budget together. Might squeeze in Mexico which is ahead of Austin but I'm a bit concerned about safety. No Sebring or Amelia this year, will head to ELMS and WEC prologue at Paul Ricard instead and hope to get in at Le Mans Classic.
@Landman : quite some airmiles indeed last year, enough to get me a cheap flight to the States this year