No the current marriage shouldn't be saved... any marriage that results in adultery needs to be reinvented, that goes without saying.

Your call on no contact... I don't think its ever too late to put a foot down and shut a spouse out... Particularly one like your husband who is doing a GREAT deal of damage to this marriage and is offering ZERO positive input, not even cash which is minimum

I don't think its ever too late to put a foot down.