International Lead-Gen Google Ads Campaign

I need to turn Google Ads into a reliable engine for lead generation across multiple countries. The campaign must be structured to pull in both B2B and B2C prospects, so ad groups, keywords, extensions, and messaging have to be segmented accordingly while staying under one coherent strategy... (Budget: $15 - $25 USD, Jobs: Digital Marketing, Google Ads, Google Adwords, Google Analytics, Internet Marketing, Lead Generation, Link Building, SEO)