Where is the cheapest and most urgent place to rent a house near Beijing Huilongguan?

Huilongguan, Long Ze and Huo Ying are all near the subway, but Huo Ying is relatively cheaper. The most expensive place in Huilongguan is first wisdom, then Xinlong City, then Longteng 6, then Longteng 4, Longteng 3, Longteng 5, and then Longbo. House prices here have gone up particularly sharply this year. More expensive than downtown. I really don't understand.