PHF,
C310, PA31 and a van up north (which was actually 100 hrs ICUS, because I didn't have any turbine time!!). My situation may be a bit more isolated as I was lucky and had relatively low time when I first flew the 310.
I was an employee in on the C310 and van (I actually got paid a 'training wage on the van, just enought to live off for a month or so). The PA31, I had filled out the paper work and told to do the ICUS with them and would be put on as a casual (at first) at the end.
Hope that answers the Q.