A new 3 part set consisting of:
HET MT1070 tractor
HET MT1070 trailer
M1 Abrams tank
all found under Decor/Misc. Decor and all cost 0.
You need to use the cheat "moveobjects on" to place all 3 together.
The tractor can be placed outside the lot i.e. slightly intruding onto the road. The M1 Abrams tank can only be used on the trailer as it was made especially to fit on top of the trailer.
HET MT1070 set (MediaFire)
Armoured Personnel Carrier BTR 60 PB