Years ago, someone posted that Roth's coughs in the "business we've chosen" scene are evidence of congestive heart failure. But, I think he overemphasized his ailments to make himself look weak--no doubt a tactic he learned from Vito.
As for "I'd give $4 million just to take a piss without it hurting": Sometimes I feel that I'd like to have $4M for that purpose...
Ntra la porta tua lu sangu � sparsu, E nun me mporta si ce muoru accisu... E s'iddu muoru e vaju mparadisu Si nun ce truovo a ttia, mancu ce trasu.