A day after a Boston company made a stunning offer to buy Jackson Health System for $1.1 billion, community and healthcare leaders on Wednesday tried to find answers to questions about the potential deal including whether the bidder has the ability to run Jackson, how to find other potential buyers and how to determine the proper price for the century-old institution. Jackson is in such difficult financial conditions ? its executives warn it may run out of cash in July ? that many leaders are willing to consider a sale, but they wondered whether the 90-day timetable set by Steward Health Care System is realistic and what the deal might mean for the 500,000 uninsured persons in Miami-Dade County. Jackson has served as the county's safety net hospital for decades, but its steady slide toward financial disaster in recent years has turned it into one of Miami-Dade's toughest problems.