Help for Peppa the Pyr

We rescued our sweet girl, Peppa two years ago, she came to us all matted and was abandoned by her owner. She instantly stole our hearts with those big brown eyes and her sweet personality, she was wonderful with my children and the best dog that we can’t imagine life without. Unfortunately two weeks ago Peppa became depressed and unhappy. This wasn’t her usual self and I knew something was wrong. We took peppa to the local vet and they found a tumor in her lung. We were recommended to go to UF as it wasn’t typical for her this age to have a tumor where it was. UF has been wonderful, but the estimated cost for examination and further exploration into her problems is roughly $8000. We don’t want to give up on her as she is so young but don’t think our family can afford that kind of expense. With your help we can at least explore our options further to see if we can save our sweet girl.