Hi-
My husband was diagnosed with Hodgkins spring of 05' and he has been in remission for almost 2 years. We encountered a similar dilema,as everything in treating this disease is so expensive. My advice would be to get online (this is what I did), and look up any and all cancer organizations that offer financial aid/support. You will find that a lot of them do, although it is very time consuming filling out form, most want your income info. etc...... I suggest the caregiver do this for him. Once you do that you will get responses, it is income based though, so it will just depend. One organization sent us HUGE boxes each month of everything you could possibly need for hygeine, household etc......it was awesome.
Also, there is a website that offers prescription drug assitance, i cant remember, just search it. You can apply for help with the prescriptions he will need along the way. I know the last thing you probably want to do is paperwork and online research now, its such a hard time. BUT IT WORKS!!! You can get help.
The medical bills you will recieve from hospitals and individual Dr. offices, call them tell them you need financial assistance. They will either take care of this over the phone, some will mail you a form to fill out. But they will help you. Just be strong. He will come out of this on top!!