Here in Hua Hin, I see only prices 5-10 M bath/rai (5 M/rai is far from city and the sea). Seaside plots are over 20 M bath/rai. Maybe can buy a land for 3M/rai in a village/rice field, but the house will be impossible to sell later (two years we are unsuccessfuly trying to sell the house (low standard) near Kalasin on 1 rai for 1.5 M bath)