Grim memory Google

My cat is sick, always has a Urinary tract Infection, has strange bowel movements, vomitting....? - treating a bowel infection

I like this the vet all the time. He has over 12 years, is a big cat at his best weighed 26 pounds and now down to 12. I had blood tests, urine tests. He always has a urinary tract infection, and antibiotics, they will always be. She pees all over the house, and I can not stay long. I hate it, sleep it, because others with this problem seem to be satisfied. It was also hard, dry stools. I think two points that mega can, but the vet gave me some, such as Vaseline, to move them. Vomiting every day. The vet thinks he may have a tumor in the gut that I wanted to treat due to their age and their costs. I can not afford, much of it I have already spent almost a thousand dollars. Has anyone any idea what can I do to? This is as serious as a cat is beautiful! So, the 2 cans of canned food and the choice of a dry day.