He wasn't a blockbuster actor before BP so he wasn't making a ton of money. Roles in smaller films like 5 Bloods and Ma Rainey aren't going to give you a big pay day. He was nominated for an Oscar and was ascending but he died right before he was about to really get big offers and endorsements.
And as stated above he was likely paying huge amounts for treatment.
And as stated above he was likely paying huge amounts for treatment.