Hubs' cousin has just recently gotten married and they are torn between buying their own place (they are currently renting a condo) or investing in a vacation home. Since they're from New Jersey, I directed them to a website about Sea Isle City rentals which I found while surfing the web.
It is a very helpful site, offering search possibilities that take into consideration the duration of the rental, the number of bathrooms and bedrooms you want or need, your price range, and a particular street or general location you have in mind. Pretty extensive and exhaustive search, huh? Plus, they also list featured sales listings and Cape May County sales listings.
Apart from rental listings, this site also offers listings if you're buying or selling. And then all their agents are duly listed in the site too, so no need to get scammed by impostors at all. If prospective vacationers or buyers want or need it, the site also offers info like what to do at Sea Isle City or Cape May, where they should go for casinos or zoos, etc.
Am sure, that website comes up first when someone googles for "city rentals sea isle" so I guess i'd just wish them luck. Hopefully, I was able to help them come up with a decision.