Costambar is a pretty decent place. It is gated although the road in there sucks but it has grocery stores, bars, restaurants and beach access. The power in Costambar is bad so make sure the place you stay has an invertor and a reliable planta for backup. As far as the Commodore, I think you can find better digs there for the same price. Google rentals and Costambar and you will find lots of choices.