Gmail Lead Gen Automation Flow

I need a hands-off email sequence built entirely around Gmail that focuses on lead generation and long-term sales nurturing. The flow should start with a personalised cold outreach, follow up at smart intervals, and keep prospects warm with value-driven content until they reply or book a call... (Budget: $10 - $30 USD, Jobs: A/B Testing, Automation, Data Integration, Email Marketing, Google Sheets, Lead Generation, Scripting)