Did he say he was going to do it all in one day?
I think what he is saying is that in his eyes this is a big job, which is worth the equivalent of two days work for him and that he was surprised that the client didn't question the price.
This could be for several reasons, he has in fact got lots of money and no grasp on value, he understands the value of money and thinks he has got a bargain, he understands the costs of the job and has paid what he expected to pay.