It's easy enough to come up with answers when it isn't happeninig to me and I doubt they would really match the seriousness of the situation. With no kids, unattached he has the choice of deciding where he would most want to be when he goes. He has a little time in which to wrap up any communicating he left undone, resolve any old issues with others, forgive and be forgiven -- all of which would add up to a pleasanter transition. He might also seriously want to consider contacting the Hemlock Society. Given the option of   months excruciating pain I might want to just go sit in a wee rowboat on the Seine or some place like that and drop the right pill, I dunno. But I would make sure I had cleaned up my messes before I did, made things easy as possible for those coming after.

This is a hard, hard question, and really he's the only one who can answer what is right for him here -- it is a domain of sacred personal sovereignty, exiting a game like this one, IMHO.

A