Giant rectangular-shaped UFO in a field in Arizona

On September 28, 2014, a man and his wife have seen a giant rectangular-shaped UFO  landing in an abandoned field located in Sierra Vista (Arizona, USA). The following morning this curious had disappeared to the surprise of our surprises…

Witness reports:

At approximately 9:45pm my husband and I went outside to have a smoke before heading to bed. It was a clear December night. We were only out there about a minute before we noticed what appeared to us to be a single wide mobile home or rectangular shaped house in the field across the street. This field is totally fenced in and there has been nothing there for several years so we were surprised to see a house. We hadn't heard anything during the day nor see any movement /trucks bringing in a house. There appeared to be a door with a window on each side. Lights were on but the house/object appeared to be empty.

We sat there discussing how odd it was that we never saw it being moved in or how quickly electricity seemed to be hooked up but shook it off and went to bed.

The next morning we got our coffee and went outside to have a smoke and the object was not in the field - there was nothing there. It was an empty fenced in field as it always was.
We don't know for sure what it was, but it was very very odd.

To this day every time we drive by we always look at the fencing to see how someone could have pulled in a trailer and there is no way.