B & H is probably the best photo/video store in the world, let alone New York. Be prepared to spend a lot of money if you go there, oh and the place is massive, I love it. A word of warning though, it's shut on Saturdays, the owners being strict orthadox Jews. They are absolutely straight and completely trustworthy, I've dealt with them on numerous occasions and have found them superb (albeit a bit unfriendly at times).
As for the assignment you've decided to set us.
In the past you have been advised to post questions seperately but have chosen to ignore our advice.
This isn't a free consultation service designing new businesses, it's a forum for videomakers and I (and the others) would be happy to answer each of your sixteen questions, on an individual basis, in the right forum. You write that you don't want to make the effort to keep track of which questions you've asked and don't want to risk having to read answers which aren't directly relevant to your scheme for making money.
The point is that the answers might be relevant to others and if you can't be bothered to ask the questions individually, why should the professionals on this forum put in the effort to reply (for free) to your list of questions?.
Since you'd be making money out of the knowledge you gained for free, you might consider paying for the advice? You're basically asking for all your research to be answered in one forum. I really wish you well in your new venture and, once you get going, you'll find loads of experience people here who will answer individual problems and questions but expecting such a huge package for free is a bit much.
I suggest you read "Basics of the Video Production Diary" by Des Lyver, "Sound Techniques for Video & TV"by Glyn Alkin and "The Essential Television Handbook" by Jarvis, which will give you a good grounding in running your own production company.