Buying land and building house himself isn't an option unless he's looking to buy land outside the valley (that is, considering his budget). 

Truth be told, even a semi-decent neighborhood in Kathmandu has an ANA of land being sold at 15-20 lakh rupees. I don't know if he'd wanna build a land w/ 2.5 ana jagga. 

Buying a house built by other companies might be a better option.