Please Help Rufus our Cat

OK so I really don’t like asking people for help but in this case we really need it!. Our cat Rufus has been very sick and has been in the animal hospital for two days now. Rufus stopped eating and started losing weight a few weeks ago. Are veterinary is not sure what is wrong with him even though they have done several tests and ultrasounds. They are doing a biopsy on his liver. 

We visited with him and give him lots of good pets. He looked better than yesterday but is still far from our little Rufus that my husband, daughter and I have loved for the last 6 years. He is our kitty and life would never be the same again without him.  He might be just a cat to most people but he is a child to us. As I said before, I don’t like ask for money from anyone but my husband and I are closing our door soon and have already spent a lot of money on all the house costs. Timing could not be worse for something like this to happen but family comes before anything else in this world.  Rufus is family and we would not be whole without him. 
Please find it in your heart to help us out if possible.  Our family and Rufus would be forever grateful!!!  Thanks guys! Please pass this around if you don't mind.  : )