Whenever by lack of space in the Capitol it is impossible or impracticable to provide proper and sufficient office accommodation in the Capitol for every state officer who is entitled or required to have an office at the Capitol, the Governor, with the approval of the Department of Finance, may in his discretion rent in the City of Montgomery for the use of such officer suitable and adequate offices, for such length of time as may be suitable or expedient, and may agree with the lessor of such office on a reasonable rental therefor.