Thanks for your input. You`re right, I might need to think this through
But I still think its doable. I`ll steer away from shops that own any cnc equipment. Period. Only old manual mills equipped with DROs. Some have pretty crappy machines but somehow stay in the business and manage to do work within 0.001". They do "one off" type work, I`ve seen places like that. Some good machinist work there....
Aluminium tooling plate you mention is perfect choice but still might need some attention, to make this right. I could do drilling and tapping later. I would avoid making bearing blocks and motor holders in shop. They can`t beat used THK or NSK product which can be found on Ebay. Router motor holders can be made by your own cnc router later.
So only thing would be milling parallel and accurate surfaces for linear ways and leadscrew/motor mounting hardware. 10-15hrs at $75... Not bad. If your CNC router ends up being production machine then its worth it.