Alex,
The FTO I was using before the aircraft went sadly U/S quote 10hrs training + 2 hrs check ride as a rule of thumb.
Its worth noting that you cant take their aircraft away until you have 25hrs dual with one of their instructors or 50hours total twin time. So in theory it doesnt really matter how long you take to pass unless you already have twin time more than 50 hours as you cant go anywhere yet anyway. I have seen higher times required quoted by other schools for rental purposes.