Client says they don't have a Business Manager. Most people hear that as a delay. It's the best starting position you will ever get. No bad habits. No mystery admins from three agencies ago. No disabled ad account with a history you'll never untangle. You get to build the thing correctly on day one, which almost never happens in this job. There is exactly one rule that decides whether you did it right. Everything you create is owned by the client. The Business Portfolio, the Page, the ad account, the WhatsApp Business Account. Created under their Facebook account, their business details, their payment method. Ownership stays with the client. Access is what you get. The trap has two jaws Building it all inside your own agency portfolio is faster on Friday afternoon and it looks harmless, because at that moment the client trusts you and you're not planning to steal anything. That's not what goes wrong. Two things go wrong, and only one of them is about the client leaving. - First jaw. If they leave, they lose their audience, their pixel data, their WhatsApp number and its chat history. Which means the exit conversation is now a hostage negotiation, and you will lose it either way: hand it over and you've admitted the setup was wrong, refuse and you've earned a review that follows you for years. - Second jaw. A restriction on your portfolio hits every client inside it at the same moment. That second one is what nobody prices in. It isn't a relationship risk, it's a correlated risk. One aggressive creative on one client's account, one appeal that goes badly, and twelve clients are down on the same Tuesday morning while you write twelve identical apology messages. You didn't diversify anything. You put every account you own in one basket and called it convenience. The build, in one working session 1. Facebook account. Use the client's real, aged personal account. Not a fresh one. 2. Business Portfolio. At business.facebook.com, created with the legal business name, a business email they can check, and their details. 3. Page. Create or claim it, then add it under Business Settings, Accounts, Pages. If it's new: brand name, category, logo, cover, a few posts. 4. Instagram. Switch to professional in Settings, Account type and tools. Then link it under Accounts, Instagram accounts. 5. Ad account. Business Settings, Accounts, Ad accounts, Add, Create new. Right currency, right time zone. Attach the client's card. 6. Partner access for you. Standard partner access, from their portfolio to yours.