Coolluke,
You will have to have a legitimate business to be able to get the licenses. It's not all fun and games and really takes a lot of work. There is the fun aspect, as you see in the video, but I also have a full time job that I go to during the day, then put in another half day at least at GunEnvy when that's done.
If you're wanting just a license to be able to build this stuff, you won't get it (not saying that's the intent). We started as a small nothing of a business, doing Internet and gun show sales. Moved to a small upstairs space about 15 months ago, then upgraded to a nicer downstairs store in another building a few months ago. We have had to build relationships with local law enforcement, as well as other FFLs to get where we are today. We hope to start full scale production of AR type rifles (as if there aren't enough already) within the next year