in the dark

Hello everyone. This is the 1st forum i've ever been in for any reason. My reason for joining this one is simple. My dad! After having congestive heart failure and being admitted into the hospital we found out that he had a mass on his right kidney. They were actually scanning his stomach to check for infection when the mass was found. They did the radiation test after that and what they found was very shocking to me. As i'm sure many of you have been in my place. They said he had a 3 inch mass in his right kidney and areas of suspision for cancer in the lymph nodes around the kidney as well as in his right lung. This is where things get hard. My dad is 83 years old and a very stubborn man. He has refused any and all forms or treatment as well as any further testing. He was scheduled for a biopsy or the kidney but after arriving for the appointment decided he just wasn't gonna do it. So basically all we know is they are pretty certain (although no verification can be done via biopsy) that he has cancer in his right kidney which they believe has spread to his right lung. My question is. Considering he has/is refused any/all treatment and testing, without any intervention what are we looking at in terms of life expectancy? We don't know what to expect to happen with him physically or mentally. So far he does not seem to be very symptomatic, Some pain but not really bad. His breathing has not gotten too bad either. He was also diagnosed at the same time with pulminary fibrosis so a double whammy to the lung. My husband and stay with him 4 days out of the week and my brother stays the other 3 so he is not left alone. Before he was hospitalized in May he was living on his own and very capable of doing for himself. After his admittance into the hospital for a week and a half followed by rehibilitation for 2 weeks in a facility he has not been able to regain his strength. We of course have no problem in taking care of him and do it gladly but we would just like to know what to expect and for how long this may last. We will be there every step of the way may it be months or years but it would help us to know what the upcoming months or years are likely to be like. any information is greatly appreciated.