What does it cost to set up hydroponic lettuce and is there subsidy?

Hydroponic lettuce setup cost varies hugely with scale, the type of system, whether it is inside a polyhouse, and how much climate control you add, so the honest answer is a wide range and you must get quotes for your own plan rather than rely on a single number. Major cost heads are the protected structure, the growing channels and pumps, the nutrient and monitoring setup, and power and cooling. Some protected-cultivation and horticulture schemes may offer subsidy on the structure or components, but eligibility and rates change, so check current schemes with your district horticulture office and NHB. Build a detailed budget and confirm both costs and any subsidy locally before committing.