1/16 tankss (not counting the gun) is about the same size as 1/10 cars.
Get a 1/15 Bandai Tiger 1 lah, not too expensive (1/2 price of tamiya but not so elaborate), good size to fight with Tamiya tanks. Cheap wor, 財政 will not 少呀~ 周百通 showed a 1/15 tiger on the #9 post on top here, the one on the extreme left. Slightly bigger than the tamiya 1/16 Tiger (second left).
1/24 are too small for any outdoor cross country run but good for run at your bed... but I am not sure if your 財政 may 少 you because you have a 1/24 girlfriend in the bed 呀