The problem
You don't need a business plan. You need to be found.
A content site isn't a business in the traditional sense — there's no sales team, no ad budget, often no revenue model at all beyond affiliate links or a mailing list. But the search problem is identical to any business: if the pages you publish don't rank, they don't get read, no matter how good they are. Most content-site owners are writers, not technical SEOs, and the gap between the two is exactly where traffic goes to die.