GGB A cloud kitchen is usually the lightest capital entry: no dining room, minimal front-of-house spend, a smaller footprint. But cheapest-to-open is not cheapest-to-run — the model hands part of what it saved in capital back through delivery commissions, packaging and paid platform visibility, every month it trades. The honest question is not which format costs least to open; it is which format pays back its capital fastest inside a model you can actually operate. That is a feasibility question, not a price-list question.
From Restaurant Setup Costs by Format — Where the Money Actually Goes — the full reading, with the method behind this answer.