Disney stroller rental?

I have 5 children (13, 6, 4, 2, and 9 months). We are going to Disney World (Flordia) and I am going to want a stroller for the 3 little ones (the 4 year old is like a just in case seat). So my question, I will bring a stroller if I need to, but I would rather not (too much lugging around). Does Disney have 3 seat strollers? What are they like? How much do they cost?