optimum # of cs to have is based more on # of acres than NW

Ideal BPT =sqrt(AcresToBuildOtherThanCS*GvtCS/4)
This is an old formula but I think it's still pretty accurate.

or if you would rather have a chart


acres ---------------CS
0 -- 400 ------------ 20
401 -- 900 --------- 40
901 -- 1600 -------- 60
1601 -- 2600 ------ 80
2601 -- 3600 ------ 100
3601 -- 5000 ------ 120
5000 -- 6400 ------ 140
6400 -- 8200 ------ 160
8201 -- 10000 ---- 180
10000 -- 12400 --- 200
12401 -- 14600 --- 220
14601 -- 17000 --- 240
17001 -- 20001 --- 260
20002 —- 23001 --- 280