This situation would have to be evaluated by a plastering contractor.In general, removing plaster and then fixing all the framing and then hanging Sheetrock is never cost effective. Itu2019s always less time and cost to fix plaster than to rip it out entirely. That doesnu2019t mean sections might need to be removed, but NEVER all of it, especially ceilings. The less you demo the lower the rehab cost.Most house flippers get killed making this mistake.