There are mostly expensive resort hotels near the aquarium. However, after checking my Okinawan phone book, there are a couple of places near there that may just fit your budget. All I have are the phone numbers, but they are right in Motobu Town which is where the aquarium is located so it will be easy to take the bus or a taxi to the Expo Park.
Yamakawa-So Hostel 0980-48-2847
Minshuku Yasufo 047-3645 (this number doesn't look right, but that's it)
Here are some resorts if you want to check prices in that area:
Hotel Mahaina Wellness Resort (this place isn't bad for the price)
Motobu Resort 0980-47-2321･2322
The Busena Terrace Beach Resort (this place is really expensive)
Okinawa Royal View Hotel
Be the first to rate this answer!