How to pay for it? Simple, and with minimal up front cost.
No one seems to realize just how wasteful military spending is. Something like 50% of the operational budget is basically thrown away. Purchases that will be stored until they need to be scrapped.
Stop that nonsense. Hire someone who actually understands logistics - someone from Amazon maybe. Customise orders for spares and consumables - no more of the "Same again, Joe" approach which leads to massive waste. Pay attention to actual needs, not paper needs.
On the procurement front - PUT PENALTIES IN THE DAMNED CONTRACTS! Stop cost over runs - "Uncle Sam will pay it anyway" is not a valid pricing option for the purchaser.