There is also the option of skillwires. When compared to training expenses, it's rather trivial at 6000 nuyen for Rating 3. You can get the whole soldiering package there, the rest can be taught normally (survival stuff perhaps). The software of course would be expensive, but I'm sure government contractors don't charge per installation. Or at least, these armed forces would have a cheaper means of providing skillsofts.
Let's see, with a Datajack, Skillwires Rating 3, and Wired Reflexes 1 it comes to 15,750 nuyen and 2.43 Essence with a Cyberware Suite.
Cheap. With an Agility of 3 and a Smartlink, that's 8 dice for shooting which ain't bad.
Now there doesn't seem to be much of a stigma for people to 'ware up in the Sixth World. And for those signing up to be in a combat MOS, I'm sure they'd take any upgrades they can to survive. That suite above is damned cheap, I've made guns that cost less than that. Factor in mass production and so on I don't think most outfits would even bother redeeming the ware. Of course, they'd be useful as second-hand 'ware to new recruits.
There are the professional soldiers who rate a Military Armour suit. Then there are the fodder that don't need much training.