honestly? 6k... kancil saga.... none are very fuel efficient given todays standards but they are like tanks

i would personally try find a later batch saga lmst or wira..... there are other cheap cars but im quite sure you want to keep costs low these 2 are very easy to maintain long as the major components arnt screwed.....
the wira is bigger but less frugal compared to the saga
*should mention that you should only consider the manuals since they are cheaper to deal with and are frugal