My mom (70s) will be coming with us on our short weekend trip. Last time we went, she had problems with her knee and ended up with physical therapy. It hasn't been the same, and since she has problems with long distance walking, wants to rent a ECV (is that the right abbreviation?). I suggested renting offsite (just two park days), but she doesn't want that (I think because of the bus). So, I know it is first come first serve. But, how early can they be rented? And are they rented outside or inside the gates? And, she wants to walk on the rides- is this allowed? We are only doing Disney World. And, if we book a breakfast at 8:05, can we rent one before then? Thanks for all your help.