Hi JonH,
Are you asking about coating a one piece frame only? Has it already been stripped? I'll make some assumtions.
If you brought me a simple frame already stripped you should expect a price @ $75 for a single basic color. Some silvers require a clear coat because the metallics lay at the surface and need to be covered to protect the metallic flakes. Candies and translucent colors require a base coat. These types of double coat colors are considered two stage colors and can increase the price by at least 50%. Using two single seperate colors would require special masking and processing the piece twice so you may be charged double plus some labor time for masking. Make sure they've done this before it can be tricky.
If you need it stripped there are many options and the price of stripping could range @ $25-$50 or more depending on the media, time and process used. It's better to let the coater handle the stripping process than taking it to two different places.
The actual time it should take to coat the part is only about an hour. Stripping the part depends on whats being removed and what process is used. Powder coating is more difficult to remove than painted coatings but it shouldn't take more than 1-2 hours for stripping either way.
I would say 1 week is a reasonable time frame for turn around.
Coaters with "batch type" processing can usually process your part quickest.
I hope this answered your question.