You can take nitrogen fixing crops as intercrops in bamboo for first 3 years... First 3 years there wont be much revenue. From 4 th year revenue will start from bamboo. Somebody frm western country has started replacing bamboo as building material. Instead of bricks, cement , sand what he has done is he made a compact structure of bamboo which interlocks . So u can make a wall, ceiling or any structure. World is running out of sand and many other resources. Bamboo is future in contruction of homes.