I would personally wait,there is no need to start replacing dogs while they are still living,i would be focused on there welfare instead of "choosing"another breed,If you cannot afford to take your dog to the vet for tumors how do you think you will be able to afford a purebred dog,and a show dog at that,It will cost alot more than what it would to take Georgia in to have her looked at.This just aggravates me you should not own any animal if you cannot afford vet bills now this is for your Mother,She could be in pain and there is nothing that can be done.