If you do not get any improvement in your campaigns in the first 30 days of running it your money back.
If you are just starting, you can begin with a budget of $30–$40 per day and achieve a consistent level within 1–2 months.
If you are just starting, you can begin with a budget of $20 per day and achieve a consistent level within 2–4 weeks.
If you spent $200 USD and acquired 10 customers, your CAC is $20 USD per customer.
Use Facebook/Instagram for mass reach, Google Ads to capture active buyers, and TikTok for viral potential.