By Sherron Lumley.   Frank DeSantis, owner of DeSantis Photography, has spent 15 years in Philadelphia and Portland building small business alliances to move his commercial photography business forward. “It’s perseverance really and it’s not instant gratification. Business is about developing relationships. I’ve always known that and been open to experimenting,” DeSantis says.   The relationships he refers to amount to a series of informal collaborations, where two or more companies work...