GGB The entry ticket is usually smaller — no fit-out of a leased shell, no landlord negotiations of the same weight. But cheaper to enter is not the same as cheaper to operate: you still carry a licensed kitchen (often a separate preparation kitchen), staffing across service windows, fuel and generator hours, pitch fees for the locations that actually have footfall, and a vehicle that depreciates and breaks. The honest comparison is not the entry ticket — it is contribution per trading day against your all-in daily cost.
From The Dubai Food Truck: Why, and Why Not — the full reading, with the method behind this answer.