With all respect, why not spend some time here and see what works, and what doesn’t work? And then make your own decisions about what’s important. There are plenty of other Q&A sites out there as well – spend some time to compare and contrast. You also need to give serious thought to your revenue stream. If you’re going to handle a lot of users and grow, you’re going to need some decent sized servers and telecom connections, and those cost money. How will your Q&A site differentiate itself from others and make enough money to sustain itself? Finally, if you want to be taken seriously, do a better job of naming yourself. “Anonymous9056” doesn’t give me a feeling of confidence that you are serious.