In implementation of the directives of the Custodian of the Two Holy Mosques King Abdullah Ibn Abdulaziz Al Saud on building 500,000 houses at a cost of SR 250 billion, the Minister of Housing Dr Shuwaish bin Saud Al-Dhuwaihi will start tomorrow a tour of the Provinces of Northern Borders, Jouf and Hail. During the tour, the Minister will follow up housing projects in these provinces. In Hail, he will inspect the progress of works in 1,200 housing units currently being built by the Ministry of Housing.