Sporting Clays - Compact Sporting.
There is a very "general" rule:
Sporting Clays:  $6,000 - $20,000 PER Sporting Station.
Average $10,000 per station (2 targets).
Compact Sporting:  $20,000 - $60,000 and up.
Average $25,000  (6 targets).
There are numerous variables that affect the
cost of developing either a
 Sporting Clay Course or Compact Sporting Deck.
A document on this website goes into
 great detail covering all aspects and every option; 
design, traps, stations, benches etc.
Shown below are "thumbnails" of this document; 
you can click each page for an enlargement or
it can be downloaded as a
17 page PDF file by 'clicking the Book below.