You obviously get a type rating cos you either want to only fly that type of aircraft above all others or you feel that is your best chance of getting employed - i.e. more airlines fly that type than any other, particularly those that accept a type rating with only a few hours. If you have a chance of a job with an airline that requires you to do a different type rating then that is surely poor targeting on your part - you should not have applied to them in the first place.
I am from the do not pay for a type rating up front camp!
I suspect though that the question is how do you raise yet more money - no idea!