Using a Small Satellite Array as C-Band Receiver?

An anonymous reader asks: "Many local zoning ordinances prohibit big (6~8 ft) satellite dishes. Is it possible to use many smaller dishes to achieve the same effect as one big dish in picking up C-band transmissions? I know that moving large number of dishes, for satellite tracking purposes, would be a pain but are there any other issues?" Obviously building a satellite array is possible, but what are the engineering issues involved in building such a project? How much space is realistically needed? And, of course, the bottom line: how much would doing something like this cost?