What does success mean for this business?
Start with the outcome you actually need: qualified inquiries, completed purchases, registrations, or another meaningful action. Clicks and inexpensive traffic can be useful indicators, but they do not tell you whether the business is getting what it needs. Write down the outcome before deciding how much more to spend.
Are you measuring the right action?
Follow the journey yourself. Complete a test of the action you care about and check what your measurement records. A checkout start should not silently stand in for a completed purchase. If the event definition is wrong, fix that before using it to judge whether to scale.
What can the business afford to acquire?
Look beyond the sale amount. Consider margins, fulfillment costs, repeat purchase behavior, and the time needed to serve a customer. A campaign can appear efficient in a dashboard while bringing in work that is difficult or unprofitable to deliver.
What will the next test teach you?
Choose a specific uncertainty: the audience, message, offer, or destination page. Decide what evidence would support continuing, changing, or stopping the test. The right budget depends on that question and the amount of data you can realistically gather.
Can you fulfill the demand?
Marketing decisions should reflect how the business operates. In a consultation with a furniture business, the conversation extended beyond ads to production capacity and which products were practical to make. Growth is more useful when it brings the kind of work the business can deliver well.