How long do you think it is?

[KT4Wextra]

This trailer is parked at the Riverview RV Park & Resort in Visalia, LA. It appears to be semi-permanent parked. Maybe someone will know the manufacturer also. It uses almost all of the concrete pad that will accommodate a 40' MH with room to spare.

[BFlinn181]

There were hundreds of mobile home (manufactured housing) builders in the '50's and '60's. I lived in Elkhart, IN in the mid '60's So many distributers of trailer parts were located in that area that anyone with a few thousand dollars could buy the parts, assemble a unit, and sell it for a profit. Many companies started and failed each year while I was living there. Unless there is a builder's plate or other identifying documentation, figuring out the manufacturer from your photo is a long shot.