I spoke with a plastics guy recently who told me he at some point realised he was outsourcing 35000 euro a year on routing.He then bought a 60000 euro router and recouped huis investment in one and a half years time.
If you start a business based on outsourcing all manufacturing, which is a good thing (!) also ponder on what should happen if things pick up.
Especially if you run a lot of small batches, having your own router becomes effective very quickly.

But it will require a drastic change in how you operate.