Fabrication options for the string 18 readout

Piece by piece:

Your buyer locates vendors for all the parts on the Bill of Materials.
Your buyer procures all the parts, warehouses them, and marks them to correspond to the items in the BOM (make up the kit).
Your favorite PCB manufacturer produces the printed circuit boards from the Gerber files we supply. (include bare board testing).
You provide the PCBs and the kit of parts to your favorite pick-and-place contractor who will mount all the parts. (include testing)

One stop shopping:

Work with a contractor who will accept the WHOLE project for one contract price.  The contractor will have the boards fabricated, and will at the same time procure all the components to be mounted on the board, and program the machines to mount them based on component placement files generated by the PCB layout program.  Then when the boards and the parts are all in house, mount all the parts on the boards, test for shorts, and deliver completed boards into your hands.
 
Requirements:
PCB Gerber files (artwork for all the layers, and part placement files from layout program)
Parts Bill of Materials from schematic program
Special instructions