I am considering buying a 2-story cape-style home in Massachusetts. The home was recently renovated, with forced air on the main floor, and mini splits in the 3 bedrooms on the 2nd floor. Questions: Is it unusual to have 2 different HVAC sources? With 2 separate systems to run and maintain, will this be unreasonably costly? There is no heat/cool source in the 2nd floor full bath. Builder says it wasn't necessary, the air from the bedrooms mini splits will extend into the bathroom...does this make sense?