There is certainly a niche demand for bush. While some clients may dislike it, a fair few will seek it out. Some others, of course, don't care.
Leg hair... not sure. I've not heard of that as a specific thing. I think women have been shaving their legs for quite a while and so there isn't a generation of guys who grew up on hairy leg porn the way there is one that grew up on bushy porn.
If you absolutely do not want to shave your legs, then don't. If you are ambivalent about it, then I think your decision could come down to how hairy your legs are. I could grow my leg hair out and it wouldn't be a huge deal. My hair is very pale, not too coarse, and not too thick. In fact, I never even bother shaving above my knees as there's hardly any hair there. But if I didn't shave my lower leg it would be visible and they could feel it even though I wouldn't have so much hair as to look masculine. I have seen women with lots of coarse, curly hair and it doesn't look "feminine." Clients may feel stongly about this.
If your feminist politics are such that shaving feels like giving into the patriarchy, I hope you brace yourself for some of what prostitutes are routinely subjected to. That is, a stream of calls and emails from entitled twats who are absolutely objectifying you. I've had men say they want to fuck me because I look like their sister-in-law or because they've never "had" someone of my nationality. There are men who will fixate on one part of your body to the point that if the rest of you left the room they probably wouldn't notice or care. There are men who will request that you dress up according to some fantasy image in your head or even role play a particular persona that may or may not be offensive to you. Very few clients are interested in us as entire people - they are paying for the privilege of not doing so. Don't get me wrong: the vast majority of the men I meet in person are perfectly nice guys who sincerely wish to have a mutually enjoyable, no-strings encounter of convenience. Quite a few of them seem to find my personality and opinions interesting. But I have to sift through a LOT of calls and messages from men who don't seem to see me as human.