Hello! My name is XXXXX XXXXX it will be my pleasure to help you with your dog today.
First and foremost, I'm sorry to hear that your dog, Maggie was diagnosed with multiple tumors yesterday. Unfortunately, when a dog has tumors in more than one place, this means that they're most likely malignant, which means it has already spread, and sadly, that means there is a poor prognosis...usually even with treatment..
As a general rule of thumb, malignant neoplasias can spread rather quickly. At our clinic, we tell clients that a dog with a confirmed case of a malignant cancer has, if left untreated, a life expectancy of about 2-6 months from the time of diagnosis. Of course, we can TRY to extend that with chemotherapy and/or radiation therapy, however in a geriatric dog with liver involvement, that time would be drastically reduced.
That being said, just like humans, every dog is different and of course, if you're not convinced with your vet's diagnosis, you can always get a second opinion from either another vet in your area, or you could ask your vet to refer Maggie to a veterinary oncologist. I think if this were my dog, I'd ask for the referal.
I understand that you(like so many other people) are in a hard financial spot right now. There are some organizations that might be able to help. If you'll follow these links: http://www.speakingforspot.com/helppayingforveterinarycare.html , http://www.theamericandogmag.com/non-profit/resources-veterinary-bills-financial-assistance, you'll find dozens and dozens of organizations that may be able to help pay for you to take your dog to the vet. Also, there are some clinics who offer free exams and other treatments and require that you only pay for medications. If you'll follow this link: http://www.vcahospitals.com/main/offer , you can see if there is one in your area.
I hope this helps.