Hospital complexes are large, distinctive, and attract a lot of traffic. Check your city’s zoning map - existing hospitals are probably in a zoning category of

Hospital complexes are large, distinctive, and attract a lot of traffic. Check your city’s zoning map - existing hospitals are probably in a zoning category of their own, and they’s unlikely to be any spare hospital-zoned land. At minimum it would take a big land use fight, before even getting into medical and public health regulation.