IMO, spending extra for a Sienna or Odyssey over the less reliable Chrysler vans is well worth it. The chances or breaking down or having problems over time with kids involved should be minimized with the these two choices.
Buying a van is like buying a woodstove. Do your home work, calculate your cubic foot needs; then just “double it” on principle where hauling (warming) people is involved. That eliminates the Mazda.