It depend the location you build the house that will make your generation to enjoy the money that will be coming out from the house rent.

To buy land in the city and build house to generate profit you have to spend big money, and if you are not financial buoyant I don't think you will be able to have such achievement in the city, because if your children are not comfortable with the house in the future they can decide to sell the land and the house to add to their wealth. But no parent will pray for his or her children to depend on their properties than to wish their children to be better than them in the future.