FROM THE ROAD, it appears to be a small, tasteful ranch house, lightly ornamented with Craftsman-style details: a good fit with the little hill on which it rests. Much larger hills surround Christine and Case DeVisser's home, which they've named The Farm. Coastal mountains are the backdrop to their 20 rolling acres of orchard grass pasture near Abbotsford, British Columbia. Case's 40-year career in the heavy equipment business, like the actual size of the home, is hidden from casual observation by being left in plain sight. The restored, vintage Caterpillar tractor on a concrete pad in the front yard points to his history, and to the construction of the acreage. Viewed from the bottom of the slope at the trout pond, which doubles as the water exhaust for the geothermal heating and cooling system, the 6,000-square-foot house reveals its full two storeys. The hill anchoring the house, the slope and the pond are products of the couple's vision and many hours of careful excavation with very large equipment. ...