Despite M's killing the agent, the most positive aspect of this mess is it forced Connor out of the just get by rut his life has been in. He's having to confront his past one piece at a time.
No matter what they do, I'm not convinced they can evade this mysterious organization which is after M. They easily found him before.
What does Marshall do with his money? Even if he chain smokes and drinks like a fish, there has to be some left over. Even the lowest paid steel worker gets paid decent money.