For long term lease, you can visit AAG Complex (Abdulla Abdul Ghani Tower)-Main Toyota S/Room, this is at the junction/traffic signals of C ring road and Airport road.

Behind the tower they have used car yard and opposite to the Masjid/Mosque they have rental services as well..

They rent used and brand new LC as well.. You can discuss your needs and i am sure they will assist you.They might rent for short term as well.

Hope this works out well.

TC