Travel from Macao to Yangjiang => Kaiping => Foshan => Zhaoqing => Hong Kong in 7 days

Well, it is manageable.
To YJ: take a city bus or free shuttle bus to Border Gate, and cross the border to Zhuhai. Then, walk to Gongbei Bus Station, and take a coach to your destination for CNY 115. The coaches are available from 8:10 to 19:10, and the trip takes about 3-4 hours. You are advised to spend two days there to see the Hailing Island, Shaba Bay, Zhapo Bay, etc.

To Kaiping: you may take a coach to Kaiping from YJ Bus Passenger Transport Station for CNY 33-43. The coaches are scheduled from 7:55 to 17:30, and the duration is about 2 hours. You are advised to spend one day there.

To Foshan: take a coach to Foshan from Yici Passenger Transport Station at no. 30, Liangyuan Road. The coaches are available from 6:05 to 19:25 at an interval of 10 minutes. The bus fare is CNY 35 or 47. You may spend one day there.

To Zhaoqing: take a long-distance bus to your destination from Dali Bus Passenger Station for CNY 34. The buses are available from 7:30 to 19:00. You may spend one day there.

To Hong Kong: take a train to Hung Hom from Zhaoqing Railway Station. The train departs at 15:30, and reaches Hung Hom at 19:31. You may spend two days there to see the major attractions: Ngong Ping 360, The Peak, Ocean Park, Causeway Bay, Tsim Sha Tsui, and A Symphony of Lights.

Thank you so much for those informations!