Accessible Vehicle and then some

Liam, age 4 and Cullen, age 1, both have Spina Bifida.  These boys have had more medical challenges in their short lives than most adults have had in their entire lives!  Liam is a full time wheelchair user and as he gets older he is getting heavier.  We have a few current needs, but at the top of the list is acquiring a wheelchair accessible vehicle or van to help with transporting the wheelchair.  Liam is an avid sports lover; mostly hockey and he plays sled hockey.  Trying to fit all that equipment into a small vehicle is certainly a challenge!  Any and all help is greatly appreciated!