You just want someone to justify you, nobody here will do.
Just do it and live with consequences.
+1
OP - I don't understand what you want from the forum
If people don't encourage you to 'ask her out', you do so anyway and it goes tits up, it's your problem to deal with.
If people encourage you, you ask her out and it goes tits up, it's still your problem.
If people encourage/don't encourage you and you don't ask her out, you'll continue to agonise and eventually resort to one of the above.
You say you have no issues with her working as a prostitute, personally I don't think that's true given the other threads you have started, otherwise you'd have asked her already.
Ultimately just make a decision and move forward with your life.