a hotel near Beijing airport and how to travel to the silk market from there?

The BJ Jianyue Shishang Apartment is only about 700 meters to the airport, located near the crossing of Gangshan Road and Nanping Street. As I know, it may charge CNY170-280/night for a standard room.
You can take the metro Airport Line at T2 to Sanyuanqiao Station and transfer metro line 10 to Guomao Station. Then you may take metro line 1 for 1 stop to Yong’anli Station, Exit A1. Upon arrival, you may walk ahead for 50 meters to Silk Street.