worked on a similar setup for a property client recently. Started with Meta before the website was live, using WhatsApp as the primary conversion point. That team was actually responsive enough to turn leads into real clients - always the risky part when you're handing off warm contacts. If you don't have a fast sales process on WhatsApp, all that Meta traffic is just dead air.
once the site went live, getting GA4, Microsoft Clarity, and the full tracking stack in place was the real game-changer. then Google Ads with proper keyword targeting (not just broad match rubbish or branded terms that already convert regardless). Continuous optimisation on the Google side - negative keywords, audience layering, dayparting - got the unit economics into a place where we could scale without bleeding budget.
They sold everything in that first phase, and we moved straight into the next project with a much cleaner funnel. the key takeaway for me was having both channels feeding into a unified attribution view. Most people run Google and Meta in silos and end up double-counting conversions or missing the assist data entirely. if you're doing this, set up a proper view‑through attribution window for Meta and make sure GA4 is deduping those click‑assisted leads from Google. Otherwise you're flying blind.