I've just decimated Hobarts Resort in the hope she'll get the badge for running a 0 star resort for 7 days. It is down to 1.5 stars at present. It may take a few days to go down to 0.
She's at level 9 diving now too so I'll get her working on her diving to get divers den. Then when she's got the badge for running Hobart's resort of 7 days (if she manages to get it to 0 stars) I'll get her to sell it and place the 5 star resort I built for my Isla Paradiso Bunch on Divers Den Island and let her run it for 7 days to hopefully get the badge for running a 5 star resort. I've been reading the old thread that goes on for many pages on the achievements.
