It is the most convenient way. The railways station is at the airport and the train to Nahariya leaves frequently (see the schedule).
The price is 48 Shekels. Travel time to Nahariya is two hours. The hotel is a 5-minute walk from the station (see a map).

You can take a private taxi from the Ben-Gurion Airport to the hotel. Travel time takes from 2 - 4 hours (depending on traffic).
The price is about 600 Shekels.