For the purpose of constructing buildings and preparing building sites for the trade or technical school provided for by this article, there is hereby authorized the use of any bond issues, appropriations, grants, gifts or any other funds which may be made available to the board of education from any source whatsoever. All buildings to be constructed for the purpose of providing the physical facilities for such trade school shall be under the supervision and direction of the Building Commission, or any agency designated by the Legislature as its successor, and no funds shall be expended for such purpose without approval of the Building Commission.