How can users modify the expenses in the Residential ProForma spreadsheet?

Users can modify the expenses in the Residential ProForma spreadsheet by tailoring them to each property for an accurate proforma. The expenses are organized by categories such as tenant-related costs, building expenses, and insurance. They can be easily removed or added as needed. Users can also rename the expenses if there are different expenses to track, mark any rows with a zero dollar amount, or delete rows from the middle of the section. However, they should avoid deleting the first or last rows in the list to keep the formulas intact.