What other administrative positions will a new district need?

The law requires that each district have a superintendent and a business administrator.  As a practical matter, a new district will also need central staff to coordinate transportation, school lunch, facility maintenance, technology, special education, career and technical education, curriculum and instruction, human resources, payroll, accounting, and so on.  The functions will all need to be provided although, depending on the size of the new district, some of the functions can be provided by the same individual.  The new district leadership, including the board of education, would need to determine the scope of the functions and staff accordingly.  This is where the increased or duplicate costs will occur, as you now have to hire additional people to do the same job(s) that one person was doing.