First step - quit your day job immediately.
don't listen to what the majority of the twats on this board have to say... for like 6 months a few years ago I used to skim through paul markham's posts thinking... wow this dude knows his shit but I'm a little too impatient and out of the loop to completely get what he's saying. Turns out he's a senile broke old fart still trying to peddle porn he shot in the 80s and hasn't a clue about what the fuck is going on in the world of porn.
porn industry sucks balls these days, especially for newcommers, if you've found a great niche it would probably be your only chance of succeeding... Of course, you'll need some money to get a site going, especially if this alleged niche involves hardcore acts.
By the way, the couple of rich/successful people on this forum amongst the useless broke trolls are typically just as stupid or are greedy backstabbing cocksuckers.
Back to all these clowns saying don't quit your day job... wtf is your fucking useless day job? Get out of it... go big or go home, no guts no glory, etc, etc. If you're going to do it, go all the way or don't do it at all.