There are enough such markets and "attractions already. Vendors can't self-manage as to rubbish removal and general cleanliness. Road congestion - don't forget, Thais like to drive everywhere, walking a few paces is frowned upon. That's why they already destroyed the tranquillity of Dongtan by opening that stretch to traffic, turning it into an exhaust fume polluted parking zone. Na Jomtien beachfront road is a major access to many hotels and residential houses and condos - this will only increase with all the new developments, slowly destroying the old Na Jomtien. The footpath, narrow as it is, is increasingly blocked by carts, all greasy, forcing pedestrians and joggers into the road and passing traffic. Bad town planning, but turning this beach into another food market is a bad option. If you want the dining on the beach experience, drive a little further south and there are great restaurants tucked away und larger trees, away from all vehicular through-traffic.