It would kinda make me question where your self-esteem and self-value as a woman is at.
This seems to say that self-esteem/self-worth MUST be low to consider having sex for money. Personally I'd argue that having sex for money is less indicative of self-esteem problems than being in a sugar daddy relationship for money.
However, lets look at the facts
Forced prostitution, sexual slavery, "survival" prostitution, etc.
These are quite obviously bad. Survival prostitution is not freely chosen, it is coerced/forced with the necessity of having sex with someone to avoid being kicked out or to be given food, etc. It's not the equivalent of working to maintain a home, or to afford to grocery shop.
I think everyone here has agreed with that, so lets put this aside even though it is a serious problem.
Now, do you see prostitution as any different than pornography?
I fully see that the current state of prostitution as well as the social perception of the practice lead to the objectification of women and supports the patriarchal 'order' of things. Pornography has often, and still is often, viewed in the same light. However just like with porn, I do not think prostitution necessarily must be these things. There are women-run porn studios and magazines that actually create material for the female eye, and lack the oppressive/repressive attitudes of Big Jiggly Butts and Hos #12.
I don't think banning prostitution solves the problem, and would support at least decriminalizing it for the prostitutes, and punishing the johns, but would prefer some level of regulation - ban pimping, accept escorts, create a system that protects the women since it's going to happen anyway. Minimize harm.
Now as for whether it's immoral for the woman? I don't think so. If she's choosing it - and I mean truly choosing it - then it's no more or less revealing of her self-worth than if she were a stripper. Our sexuality's value does not lie in it being unused or protected, but in our being in control of it. If she's not choosing it, or engaging in it purely due to survival/addiction, then that's exploitation.
But there's no scenario I can see that is reasonable, that involves it being immoral for the prostitute (referred to as female throughout, most male prostitutes service male clients whether they're gay or straight ((gay for pay)) but they're not as common by any means) unless she believes it to be wrong for herself.
How do you feel about other sex (or similar) workers - like professional dominatrices who have no actual sex with a client, modern 'sacred' prostitutes who may or may not have sex and promote tantric practices, strippers, etc?