Sale price is $119,900 per acre. East Troy Business Park - 227+/- Acres; Southeast Corner of I-43/Hwy 120, East Troy.ommercial and Industrial sites - fully improved with off site storm water management. Commercial Sites Available (See Site Plan/Price List-per acre); 2-80 Acre Sites available; B-3 Hwy Business. Strategically located on the I-43 corridor providing easy access to both the SE Wisconsin markets as well as Chicago and northern Illinois.