Five boroughs are five auctions, and your budget fits maybe two of them
One campaign aimed at New York spreads a small budget across an enormous and uneven market until it stops buying anything.
Manhattan does not price like the Bronx. Queens does not behave like Staten Island. Add Nassau, Westchester and the New Jersey side of the metro and you have a set of separate auctions with separate competitors sharing one line in your reporting.
Concentrate. Pick the two or three geographies your practice already converts in, and put the money there rather than spreading it evenly and finding out in ninety days that everything was underfunded at once.
Defend your own firm name first. It is the cheapest inventory you will ever buy, competitors and directories bid on it, and a caller who typed your name is not a prospect you should be losing at the last step.
Everything else gets added deliberately, one geography and one case type at a time, with a reason attached to each addition.