Rural self-built houses, light steel structures or traditional brick-concrete structures, which have a lower budget?

It must be a traditional brick-concrete structure. Brick-concrete structure means that the walls and columns of vertical load-bearing structures in buildings are built with bricks or blocks, and the beams, floors and roof slabs of horizontal load-bearing structures are built with reinforced concrete structures. In other words, brick-concrete structure is a load-bearing structure with a small part of reinforced concrete and most of brick walls. Light steel structure is a young and vibrant steel structure system, which has been widely used in general industrial, agricultural, commercial and service buildings, such as office buildings, villas, warehouses, stadiums, entertainment, tourist buildings and low-rise and multi-storey residential buildings.