Originally Posted by viperjpm2
I am more interested in whats in the background, what is that thing?
Ha! It is strange.
As I understand this, a company in California during the late 1950s, and early 1960s, marketed these as pre-fab homes. They were manufactured and then shipped nearly complete to your location. Once there, you added anchors, power, and water/sewer and it was ready for living. It is hard to tell from the photo, but the "living" area is fairly large.
Evidently many of those sold were used as cabins, lakehomes, etc. This one sits just off a state highway southwest of Dallas.
The only part of this story I can completely confirm is the location, so someone here may be able to fill in more detail, or correct any misinformation.
Here is a wider view that better shows the scale of the pre-fab.