There are a fair number of low cost rentals that are advertised and when visited get moved into the "not as advertised column". So when I find ones that live up to or exceed expectations I am excited and happy to share. A variety of varous styles of beach huts can be found at Cuddles Huts and Beach Homes. This was my favorite of the tiny abodes. Other styles are available as well as larger homes with more robust land impact allowances.
65 linden a week gets you 20 land impact to use for décor. Most share mini-islands with another hut. There are some large public areas as well as plenty of water.