There is no shortage of reasonably priced guesthouses in Hua Hin. Accommodation ranges from luxury 5 star resorts to small family run guesthouses. Guesthouse prices range from around 150 baht for a basic fan room up to 800 baht for aircon, bathroom etc. Many are located centrally or on the beach making everything conveniently accessible. Try here for more Hua Hin guesthouses and Hua Hin accommodation.