hmm, i love how the 'school run' is being denigrated as not worthy of a nice car.
I bet op does things like buy food for the family, drive kids to clubs, meet people & promote their social life - all things which benefit the dh, the kids and herself. all things which need a car.
if she needs a 4x4 of a decent size, and her dh doesn't want her having an old car, then the budget needs to fit that.
if he's telling her she needs a certain type of car (and it sounds like he is, mainly so he doesn't have to drop kids off himself) then he can't tell her it should less then it does. what's she supposed to do? walk into a car sales room, tell them her dh wants x car but will only pay y amount, and see if they'll kindly take 15k off the price?
he's starting to sound like he views himself as the big 'i am' just cos he's got a job which pays well.
and if she feels he's controlling her, well that needs addressing as well.