Mountain Plains Equity Group, Inc. Share: Developers & Subdividers Mountain Plains Equity Group, Inc. Visit Website 2101 Overland Ave Billings, MT 59102 (406) 254-1677 (406) 869-8693 (fax) About Map About MPEG manages the entire development process, from financing & land acquisition through design, planning & construction of affordable housing projects. What's Nearby? Distance: 5 10 15 20 25 50 mi.