Mustang & Wilfur,
According to:
www.globalsecurity.org/military/world/russia/9p140.htm
BM-22 and BM-27 are the same thing. The designation BM-27 is the correct one for the 9P140 Uragan (Hurricane)
220-mm Multiple Rocket Launcher which I think is what we are talking about. The 161 building points correspond to a battery of BM-21s (not batallion). The cheapest Uragan I found is the on map battery at 462 points. Nothing close to Mustang's 250. Am I missing something?