If your budget is limited, but you still want to taste the authentic food in Jeju Island, here are some suggestions:

Street snacks: There are many street snack stalls in Jeju Island, which provide various delicious local snacks, such as fried chicken, fried fish cakes and fried rice cakes. These snacks are usually cheap and can satisfy your taste.

Seafood market: Jeju Island is a famous seafood producing area with rich seafood resources. You can go to the local seafood market, buy fresh seafood, and then choose a nearby restaurant to pay for cooking. This can save some expenses and you can taste authentic Jeju Island seafood.

convenience store food: convenience stores in Korea offer a variety of cheap and delicious food options. You can buy instant noodles, fried chicken, drinks and other foods that local people often eat in convenience stores. These are economical choices.

Local restaurants: Although some local restaurants have higher prices, there are also some restaurants with moderate prices that can taste authentic Jeju Island cuisine. You can consult some local restaurants with high cost performance, and try some local specialties, such as black pork, Jeju barbecue, seafood fried rice and so on.

Local markets: There are many local markets in Jeju Island, where you can buy fresh fruits, vegetables and local special ingredients and cook them yourself. This can save more money and experience the local cooking culture.

No matter which way you choose, you can taste the authentic food of Jeju Island on a limited budget. Remember to try some local dishes and feel the food culture of Jeju Island. I wish you a pleasant trip in Jeju Island!