Beach chairs and umbrellas

Sometimes they are available at Sam's club. Umbrellas are easy to come by, sometimes you can buy used ones from people who are leaving.

Buying them, the best deals are on Mercado Libre. Also check both Amazons. If you order some, order them so they arrive when you do, then resell them when you leave.

A number of rentals now include two beach backpack chairs and an umbrella.