Why rent baby equipment?

Does anyone rent baby equipment when traveling? What are some good reasons... trying to decide if I should or not!
Update: Airlines are charging an arm and a leg for luggage - it would cost us around $400.00 to bring just the staples that we would need for our twins. That doesnt include toys... just crib, baby gates, etc.
Update 2: I have received a quote from the airline, that the costs of the extra items needed for our 2 month vacation with our twins is $398.72. So yes, it will cost around $400.
Update 3: (And its only $40.00 a week for a crib, including bumpers, sheets and mattress)
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