Fifty million home-based businesses will be in operation by 1997, according to Link Resource''s National Work-at Home Survey. All around the country, people who want more control over their lives are starting home businesses. In New Orleans, Rick Hart''s home based cajun Cargo ships seafood nation wide. In Palatine, Illinois, Stephaine Heavey works from home designing and selling original patterns for fabric dolls. And in Dallas, Lisa McElya published the Dallas Party & Event Planners Guidebook from the entire first floor of her two-story home.