One campaign for five boroughs hides which borough is losing you money
Averaging Manhattan, Brooklyn, Queens, the Bronx and Staten Island into a single line of reporting guarantees you cannot see where the budget is being wasted.
Split the account by borough first and by keyword second. Each one has different competition, different housing stock and a different job mix, and each deserves its own budget you can turn up or down without touching the others.
Manhattan buys differently. A large share of the work is buildings rather than houses, and the person searching often reports to a board or a managing agent. Staten Island and parts of eastern Queens look far more like a conventional single family market with pitched roofs.
Brooklyn splits internally. Brownstone belt work in Park Slope and small flat roofs in Bushwick are the same borough and not the same sale.
Nassau County and Westchester are separate decisions entirely, not an extension of the radius. If your crews go there, fund it deliberately and watch it on its own line. If they do not, exclude it and stop paying for the overlap.