I'd ask Rocco Baldassarre. He is the best online marketing consultant I've ever seen and can surely give you concrete advice. Said that, my advice would be a) your own e-commerce store so you can drive traffic to it without losing money on commissions b) learn from best selling products (you ca...
I would focus on having each page optimized in such a way to serve your target client within each specific geo location. Simply make sure they don't share duplicate content.
Angel List (www.angel.co) is a good resource - people and entities are gauged on their 'signal' rating so you can see who's most active, and that's a pretty good hint as to who is most likely to have leadership/influence in a particular area. You can search by one/many of filters such as Market, ...
You're already saving by using a fulfillment house in each region. You could save a little more on costs by sending the product to the 3PL already picked and packed. If your product is repacked in a mail-ready package that will save some. You could take that one further and send the picked, packe...