And yes of course money is the deciding factor of whether she sees him or not. But these girls arent going to spend time with anyone who doesn't have the money. One of their big fears is being robbed, and they probably encounter that a lot more than serial killers, and risk of being robbed goes down as the age of the john goes up, also his job factors in to this as well. Some men probably have to pay more because they have some sort of handicap or deformity that girls find repulsive. That could be part of the reason he hates women so much, if he grosses women out and can only be with a woman for a price, it might make him hate them for not wanting him without the money involved. If that makes sense. And a handicap might make a girl feel safer also. Also older men tend to make working girls feel safer, its the younger more aggressive ones they worry about. Peter Hackett has a missing leg and access to strong opiates. So in the girls mind, here's an older man, a doctor (which means he has money), and hes missing a limb. To them that's pretty low risk. Little do they know he has a severe hatred of women and syringe ready to drug them. Just an example of someone who would fit that profile. Not saying he is LISK. But I'm not saying hes not LISK either.