With regards to people being interested in the Aquaponics system, I generally get the same reaction that you describe.
The issue that I run into, however, is that when it comes down to waiting 12-16 weeks for a lettuce, people seem to lose interest.
On the sharing of ideas,
I have published everything I found during research or published myself on that website I linked above
Please feel free to take advantage of anything there.
And most importantly, I wish you well in your business endeavor.