Well OP, no one is going to spell out a niche for you. If they're going to give you a niche, they could've used it themselves and would they want to increase competition? Niche is the most important thing when creating such a website. You need to spend some time on it. Even if someone says,"Hey. Just make a website about XYZ niche. You'll make $$$ easily." You cannot blindly follow without doing your research so why not research to begin with right?