If you are serious about a six seater and there happens to be any twins around you might consider them as an aletrnative. I think it is still 25 hours P1 time before you can do your multi but you might get your multi done in not a lot more than the minimium. (5 hours I think).
Actually, it's 70 hours PIC that is required before applying for the MEP Class Rating and the course is at least 7 hours theoretical knowledge training and 6 hours flight training. Probably not a sensible option in this case, particularly taking into account the last line of Post 25.