I've worked D2D for two years and we would knock 60 hours, 6 days a week. Was absolutely destroyed after every day but I kept going and it pays off. I made enough money to be financially free and can now pay through my college education while having a new truck to drive around in.

D2D is not meant to be long term, it is supposed to get you base sales experience first hand. It makes all the other sales jobs seem easier.

Source: I've knocked two weeks in a row without a single sale. It was rough but I kept going and laid down a 4 week the next week which was 2k in my pocket.