Is Giloy profitable on poor or marginal land honestly?

Honestly, Giloy can be a reasonable low input use of otherwise idle marginal land because it is hardy, cheap to start from cuttings and needs little water or care. But low cost does not mean guaranteed profit. The selling side is the weak link: prices are volatile, demand has cooled from the immunity boom, and there is no fixed mandi, so without a confirmed buyer your dried stem may not sell. Treat it as a low risk side experiment on land that is anyway idle, not as a main income bet. Start small, find an actual buyer and confirm a real price first, and only then expand. Keep all income figures as unverified ranges until you have sold a lot yourself.