Create a Video Website!

Hello, I want to create a website similar to Yahoo Answers. I have a question and instead of posting text, I post a video q. Another user wants to reply to my q, so they upload a video to my question. All videos would have a 1:30 second length, we would need different categories, user log ins, etc. So it's like a Yahoo Answers/YouTube. However, no video blogs, no music videos, etc. Strictly Q&A. I'm testing the waters to see what kind of rates and start-up costs I would run into for starting this site. So nothing is 100% definite. I would need someone to find out how would we host these videos, how much space would we need, I'd need someone to create/design it, I would need to know the time frame - if I award the job, how soon could we publish it? It's NOT a rush adventure, I rather have it the best possible versus a rush job. Information on getting our domain, any estimate on what our monthly running costs, etc. I want it to look professional, but I'm an individual so I'm trying to find out what I will be getting myself into before starting. Please post any background information, experience, etc. The best thing you could do is show me examples of the websites that you've created, so share links or screen shots - and I will check them out. Thanks!