The honest floor is 50,000 BDT. For a Gulshan business that usually buys one tightly built campaign plus the conversion page behind it — either Google Ads to bring leads now, or a local SEO foundation that compounds, depending on what you need first. The next tiers are 90,000 BDT (more channels and pages) and 1,50,000 BDT (deeper SEO, Bangla + English, advanced funnels). A full multi-channel build is custom, from 3,00,000 BDT.
That price is my fee for the work — your Google Ads spend goes directly to Google on top and stays in your control. 50 percent advance, 50 percent on launch. Anyone in Gulshan quoting a flat 15,000-taka "full digital marketing package" is selling you boosted posts, not marketing.