I think you have no idea. I prefer northern food and in Hua Hin there's 1 good north style restaurant which charges double for everything. The best cheap food was in a mall. Dollyfish is junk btw. Udon has better restaurants for western food and cheaper. Bangkok and Chiang Mai far superior for all food types than Hua Hin.
Food near the beach is all inflated. Cheaper at Ao Manao.
Hua Hin has good beaches and room prices are ok but food poor or rip off.