not ready for belgian malinois puppy

at home we have about 1.5 acres of yard but a relatively small house. we have a 2 year old german shepherd/husky and two cats. my family has been wanting a new dog and we went to the shelter to find one and they decided on a belgian malinois. i tried to tell them its a high maintenance breed and that we should be thinking about the cats safety and stuff but they didn’t back down. so now we pick up a 3 month old malinois tomorrow and i was wondering if anyone had any advice for raising a puppy to be good around cats and just raise a happy dog. thanks