The Director of the Youth Authority, in connection with industrial training at the Heman G. Stark Youth Training School, Chino, California, may provide suitable materials and facilities for use by persons confined in the school in the construction of houses which can be moved which, upon their completion, shall be sold to the public upon competitive bids. Proceeds derived from the sale of any such house shall be deposited in the General Fund. Construction shall be limited to not more than one each calendar year and the size shall not exceed one thousand two hundred fifty (1,250) square feet.