You will collect a lot of tech scrap as you play throughout the game and this achievement will be easily obtained.
Some idea's on what you'll be spending your scrap on:
- Blueprints for Armour sets that you can't dismember enemies for
- Refreshing your omni cells ammo
- 30,000 on a single SSM 'Vanguard' Missile, which you'll use to unlock the 'Three Birds With One Stone' achievement