Given OP's stated reasons, I think the question I asked deserves consideration. Step 1: why are you doing P4P? Step 2: if you intend to pursue NSA relationships of other varieties, what reason(s) can you give women to satisfy the same personal needs for the same or similar arrangement, sans money?
The question of "Why are you doing P4P?", is perfectly legitimate. However, it's probably very difficult for many to publicly admit why or even answer this honestly to themselves. Maybe it might be better to flip or modify the question.
So, my perspective was more on the practical considerations that Bob seems to be mentioning. Cost and getting a non-P4P or normal sexual relationship. In the non-P4P context, it can also be about emotional satisfaction. Some men are perfectly and emotionally content with their P4P arrangements, while others are not.
Beyond Cost
This is tied up with ROI (Return On Investment). The "Return" can be more than just sex, it can be about emotional satisfaction. Investment can be about more than just money, it can be about effort and time used. The importance of looking at this can't be understated.
For the amount of money that you are spending OR time and effort you have invested, are you emotionally and sexually satisfied?
P4P = Non-P4P/PUA
They can be seen as different sides of the same coin. Just a matter of which you prefer, or play both sides.
Mostly, P4P = Money and Non-P4P/PUA = Time & Effort. And actually, P4P and Non-P4P has bit of both mixed in.
Usually, there is no escaping one or the other for men. You can try to be more efficient (less time and effort used) or spend less money, but there is a limit to how low you can go, and a limit to how much money or time & effort you are willing to spend.
Non-P4P or PUA, requires that you spend time and effort searching for and filtering women until you find a woman that you are satisfied with or is what you want. Some men are unwilling to invest in such a large effort, therefore spend money as a shortcut to sex.
P4P requires you spend money. Some men are unwilling to spend excessive amounts of money or are emotionally unsatisfied with paid for sex, therefore will only do PUA.
This is why I consider both relatively equal. I would never put down a man that enjoys P4P, especially if he doesn't want to do deal with female emotional drama and games. On the flip, I totally understand a man wanting more than the illusion of a prostitute liking him and paid sex, thus wanting a real girlfriend or perhaps a family.
If Bob would like a sex friend who is not a prostitute, it means he must invest TIME & EFFORT to accomplish this goal, in addition to some money too. He will see the return on his investment, more on the backend or over time, as the money and effort spent on a steady girlfriend is usually less than P4P per sexual encounter. If he is lucky, the girlfriend will put in an EQUAL amount of effort or money (value) into the relationship, but that's a lot to ask from the modern parasitic type women.
There is usually no "free lunch" with women. They will make you pay in one way or another. Even if not in money, then emotionally, time wise, or in effort. With that stated, it's a matter of what a man's goals are and preferences, as to which route to take.
