Ellaidhoo is a private island in the North Ari Atoll, Maldives. The beach is good only on the southwest of the island. The rest of the coast is the concrete wall. Moreover, around the island there is a breakwater being the ugliest in all of the Maldives. The only good thing about this place is a great diving on the outer side of home reef. Shore and seabed: sand, stones. 
Ellaidhoo Maldives by Cinnamon is a 4 star resort with room's minimum fare about US$200 per night. A more realistic price for the most dates starts from US$250. It's very cheap, but you should understand that the hotel is very basic as well. The main disadvantages are the old rooms, crowd of tourists everywhere and very bad beach.
Fly to Male international airport (MLE). Next get to the island by seaplane - 25 minutes per way (US$390 adult / US$190 child for the return) or by the hotel's speedboat - 1.5 hours per way (US$200 adult / US$100 child 2-11 years old). Children under two years old travel free of charge, if don't take a seat.