You can consider living near Kecun, Haizhu District. It takes only one transfer from Guangzhou South Railway Station, and it is also very close to Guang Zhouta. You can also go back to the hotel as soon as possible after visiting Guang Zhouta that night. The next day, it takes only 5 subway stops from Kecun to Changlong, and it takes about 15 minutes to get there, which is relatively convenient.
Of course, you can also choose to live directly near Chimelong Scenic Area, take the subway to Guang Zhouta on the first night, visit Chimelong near the hotel on the second day, and leave Chimelong on the last day. You don&;t need to change by subway line 7, and you can get to Guangzhou South Railway Station in four stops.