This is very hard to answer without seeing the car. If the frame is solid, and there isn't much rust through of the body panels you can get work done by just about any body shop.
A '57 Skyliner (is this the hardtop convertible?) could be a very valuable car. A poor restoration job could hurt the value more than help it. States like TN, AL, and GA might have better rates due to lower labor rates.
Before you do anything you might be best researching classic car sites for some insight. If the motor, transmission, differential, and brake systems work they can probably be worked on by just about any mechanic to make the car driveable. IF it were me I'd replace virtually all the brake lines, both solid and rubber sections, and be sure the brakes work properly before I'm going anywhere. This car is over 50 years old so either some restoration work has already been done, it was stored for a long - long time, or it is in pretty rough shape.