This hotel or ryokan costed me nearly $700 for 2 nights including 2 meals (including optional items) but totally worth the price. If you plan to stay at Atami in luxury, I highly recommend this hotel.
From Hamamura Station, I took a local train back to Tottori Station, which is covered by JR Rail Pass. There is a loop bus available only during weekends and summer holidays at bus station right outside of Tottori Station. This loop bus will take you to all major sightseeings.