If it was so easy to start a seed bank everyone would be doing it...Probably not the smartest idea to start one in the US.
Once you get successful the fedz will be knocking on your door guaranteed.
Cannabis is an easy bust for that agency and they'll do whatever it takes. Best to look up the laws of wherever you're operating to/from since ignorance of the law isn't a defense for federal crimes. Wish you the best, I see the appeal with the $$$ but I don't think its gonna be easy and you have make sure to cover your arse.