Do I need a distillation unit to make money from Tulsi essential oil?

To produce Tulsi essential oil you need access to a steam distillation unit, either your own, a shared one through a farmer group or FPO, or a custom distillation service that processes your herb for a fee. Owning a unit is a significant investment that only pays off at a reasonable scale, so for a small grower a shared or custom unit is usually more sensible. Oil fetches more per unit than dry leaf but you need enough herb to make distillation worthwhile, and oil quality and yield depend on the variety, harvest stage and distillation skill. So weigh the extra investment and effort against the higher price. If you cannot access distillation affordably, selling dry leaf or whole herb is the simpler path. Confirm a buyer for whichever form you choose, and the oil price and quality standard in writing, before investing.