I work for a company that targets dentists. I am always thinking if we could run a direct mail campaign with 3 or 4 other companies targeting the same audience

I work for a company that targets dentists. I am always thinking if we could run a direct mail campaign with 3 or 4 other companies targeting the same audience we can reduce our cost by more than 1/3 and we can offer awesome packages to clients. The same is true for paid search, facebook, etc...