Call or text agent Rick Tysdal at 605-641-1030 or Jason Tysdal at CENTURY 21 Spearfish Realty. Live on 10 acres in M & M Ranch Subdivision. An unfinished basement can be added for $17,000. You may add a 42x30 shop with 10 foot side walls, two drive thru 10x9 doors, two windows, walk thru door and gravel floor for $27,500. Finishes are per the Residential New Construction Guidelines for the Charlotte.