Short answer: spend a test amount you can genuinely afford to learn from, no more, and judge the result by what an inquiry costs you, not by clicks. Google Ads pricing is an auction, so costs per click vary by city, service and season, and anyone quoting you a universal right budget is guessing with your money. I advise small businesses on this through my marketing work, and the thinking below is the same math I use for my own studio.
Decide the amount whose total loss would sting but not hurt, and treat it as tuition. Ads need enough spend to produce real data: a handful of inquiries tells you something, two clicks tells you nothing. During the test, your job is to watch what the money is actually buying. Send the ads to a proper service page, like a team headshots page if that is the offer, because a weak landing page will fail a fair test and blame the ads.
Track the chain honestly: spend, inquiries, booked jobs. Divide the spend by real inquiries, form submissions and calls you can count, and you have the number that matters. Then compare it to what a booked job is worth to you. If an inquiry costs a small fraction of a typical booking and some inquiries convert, the campaign is a business tool. If the math needs every inquiry to become a client just to break even, it is a slot machine.
A test ends in one of three decisions. Pause, if the inquiries were wrong or absent and you cannot see why yet. Fix, if the clicks look right but the page or the offer is leaking them, which is the most common result and the most useful one. Scale, slowly, only when the cost per booking is proven over more than a lucky week. That patience is unglamorous, and it is the entire difference between advertising and gambling.
Because clicks are not customers. A cheap click from someone researching a school project is worth nothing, and an expensive click from an office manager booking a team day can be worth a great deal. Cost per inquiry, then cost per booked job, are the numbers that tell the truth.
When the test budget is spent and the inquiries are not there, or the inquiries are the wrong kind. Pausing is not failure, it is the test doing its job. Fix the landing page, the keywords or the offer, then test again with intent, not hope.
Costs per click vary a lot by market and by service, and broad terms are usually the priciest and the least specific. Long, specific searches, the kind a real buyer types, tend to be where a small studio's test budget learns the most.
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