Hey Harrison
I purchased a plot of land last December and it has increased in value already. This is before the build has even started so I don't think your property will lose any value if you buy.
I don't think you will have a problem with rental either as it is a year round holiday destination now, obviously you won't have the same rental during winter months.
some resorts are busier than others so depending on what you want.
Hope this helps
regards