Um....you know im a gonner if california decides to reject your offer? You also know they have spent over 100 IC (from Kiwitts calculations) on this war, and will therefore be unlikely to settle for 30? I have 2 islands left, no IC in those islands either (due to me using it up for supplies to continue resisting last turn) and no way to get supplies for my armies until I either get aid, or retake islands.
Perhaps kiwitt will allow you to come to my aid in military form this turn anyway, due to me becoming your vassal after the normal DoW deadline, and due to you just getting back from mexico.