There are some people here who don't like LG, but we've had the LG SS DW with hidden controls for about 9 months now and I cannot complain one bit. I know a few people who have a complete suite of LG and they love it. There have been problems with LG fridges in the past.

If we don't get a Big Chill Fridge, we will probably go with Samsung for the fridges. Their fridges tend to rate well both here and Consumer Reports.

For a rental property you should really stick to a main stream brand such as Whirlpool, GE, or Frigidaire.
You will always find people who can service these brands and they generally will have more experience with them than the Samsung and LG.

I'd focus less on appliances and more on the stuff that doesn't get noticed much if it were my beach house. Sea air is really hard on exposed building materials. Lighting fixtures, hardware for windows and doors, and roofing all take a beating at the beach. Tile roofs with withstand the elements and temper cooling loads. So will foam insulation. Stainless steel or bust for outside fixtures, though some PVD finishes wear well. Making sure your water is filtered for crud and pH neutrality will prolong the life of your waterheater(s), dishwashers and washing machines. The beach is usually notorious for crappy water.

We have beach condo that we rent out approx six months a year. Since we have owned it (11 years), we have replaced every appliance (some more than once!). As a matter of fact -- we were just there and had to get a new washer because the pump died on us -- better now than when a renter is there.

Anyhow, my advice, is to get middle-of-the-road simple to use (and clean) appliances. People on vacation usually don't care if your place has a convection oven, for example, or if the clothes washer has a an extra rinse cycle.

I actually got a coil stove last time we replaced it. It works just fine and I don't have to worry about anyone abusing the cooktop as in if we had a smoothtop stove.

We don't rent our house out anymore but when we used to it was such a pain if something broke down. I would go with a brand that is easier to repair - as the other poster mentioned (maybe GE) and make sure you have a place on hand in the area that can definitely fix it. It's a house, not a condo, correct? If so, I'd put a little more money into a quality grill for outdoors. Most people vacationing at a beach house are grilling more than anything else. Hope that helps!