There are different models out there. So say, I decided to blog and build a list around my chosen niche. I spent months building that list and setting it up. How soon can I build another list on another niche if I want to lay my "eggs" in different baskets? Reason I asked is because successful marketers have multiple blogs, build multiple lists, or just do different things they fancy but I wonder how they do it. I wonder how they scale up and branch out into different territories, so to speak.
What advice would you give me if I wanna venture in multiple niches and build various business models? Hope you got what I mean.