The easy way to fund a new military plane is:
- remove one bolt and raise in the air
- slide out rev 30 "parts" from beneath bolt
- slide in rev 40 "upgrade parts" (fuselage, wings, engines, etc) underneath the bolt
- fly "upgraded plane" without a lot of pesky 'new plane" studies
Additionally, in parts of california, how to build a house:
- find existing house
- pick a wall
- remodel everything except for that wall
- reap tax benefits in your 99.9% new house.