Prices: depends on content, size and style, but as a rough guide, approximately:
Timescale: Can be dictated by deadlines - anniversary, Christmas Card of whatever, but generally a matter of weeks.
Presentation: in a simple mount but for more sophisticated -
Framing: the excellent Old Barn Framers in nearby Sherborne will oblige @ around £100 including wrap and deliver. They also do giclee prints for further reproduction.