I'd say figure out what you and/or your friend are really interested in, and build something around that. The market for BTC is so new and open, don't waste the opportunity to do what you like!
I assure anyone that the main intent isn't to get high I've have the honor of watching his spiritual rituals and as odd as they may be I'm kind of starting to believe in it a tid-bit. Of course people will want to get high but from my partners experience is "with a spiritually bad intent with the use of these ethogens comes with bad experiences" which to me means that if you take them to get high your going to fall in a world of hurt because you don't know what your in for. I believe it too I've seen how much time and energy he displaces to be respectfull to that which isn't physically here.
Thanks for the input guys! keep'em comming!