Build a food trailer for me - $1 (Spring Valley)

I have a 12ft dual axle trailer with a side window and electrical that was never finished on it.
I need you to build a food trailer from start to finish.
I would need a hood purchased installed,a sink, possibly ac installed, water tank,gas line and stainless steel flooring.
I can currently can buy a new trailer with equipment for $21k.
This project would obviously need to be a lot cheaper since I already have the trailer and side window,along with some electrical installed.
Please quote me and let me know your experience.