The key question will be, how old are the kids?
If one of the kids is under 3, she can stay anywhere on property with the 4 kids in one room. I would assume value would be her best price.
If all kids are over 3, than the next best value for a party of 5 would be POR with the trundle bed in the bayou section. I believe this is still cheaper than a suite at ASMu, but that will probably be her best option after POR.