Where can i find a guided tour for 3 days for 6 people on march 3 to march 7 in Beijing?

I suggest you join a Beijing Tour(https://www.travelchinaguide.com/package/beijing.htm) which will provide you guide and accommodation . Well, for a reasonable hotel in Beijing, you can try King Parkview Hotel Beijing, which is located at Tian'an Men Square area, 4 star but not costly.