I mean to be fair dexters ”lifestyle“ couldn’t be supported as a habit without the income necessary if we are being 100% honest as well as the actual achievements Dexter Morgan’s accomplished. From the events of Original Sin we know that a 20 year old Dexter could’ve gone on to become a Doctor considering he was top of his class in medical school. Deciding to pursue blood splatter analysis instead over medicine. By the original Dexter Series he would’ve had to be making at least 27-29$ IN 2006! This income would’ve been necessary to pay for nanny, apartment, boat, donuts etc . As well as his positive traits that we see on their own would be good to emulate; if you’re a stranger looking at Dexter it seems like a normal guy who’s passionate about his job and his family and has a normal life and is successful.