The monthly cost of running a search arbitrage campaign can vary widely depending on several factors, including the volume of traffic you aim to acquire, the cost per click (CPC) or cost per thousand impressions (CPM) rates, and your budget for advertising. On average, small campaigns might cost a few hundred dollars per month, while larger, more aggressive campaigns could run into thousands of dollars. It’s essential to start with a budget you are comfortable with and scale as you see positive returns on investment.