Small Emplacement Excavator
As you've probably noticed by my posts my players usually don't get far before they bog down due to logistics and this usually means some sort of defensive site.
Now, having the players stand forlornly there with a spade and a mattock off the humvee is humorous at first but if you're serious about getting some dirt between you and the incoming supersonics you need machinery.
Here the US Army and the Bundeswehr offers the following:
The Small Emplacement Excavator is a Unimog truck turned into a suspiciously effective front-end loader. Also known as the Unimog 419 (the big engine 'Mog 406 series or the "U-1300L" from Paul Mulcahy's website) but assuming that it only has its external load available. This isn't strictly true, it has its normal cargo bed which you can dump stuff in but its normal load weight is used up by the digging equipment limiting that greatly.
The digging gear can be removed in one period and stored, only using up 750kg of its 2,250kg load with the attachments and making it an awesome truck again. You can even use the digging arm as a light crane by slinging a chain off the knuckle.
Honestly, there's so much to love about 'Mogs although they have been known to roll over.
Price: $7,500 S/- (the WarPact have their own versions)
http://www.military-today.com/engineering/see.htm
http://www.pmulcahy.com/light_uv/german_luv.htm
https://en.wikipedia.org/wiki/Unimog#Variants