A wall vs. trailer question.

In a past post, Mike wrote:
This description is in the generic benroy plan.
With the side walls hanging over the frame a few inches, a 3/4 to 1 inch floor, a 4-6 inch mattress, and a little over a 1 inch ceiling it would seem to me that the 4 foot side wall ( according to the plans) is now closer to 3 feet!
Isn't that getting kind of cramped on the inside or am I missing something here???
3 feet does not sound like a lot of room.
Please enlighten the rookie!!!
Thank you
The first modification Is to change the width of the trailer from 60” to 58”. This will allow the side walls to hang over the frame, thus hiding the frame.
This description is in the generic benroy plan.
With the side walls hanging over the frame a few inches, a 3/4 to 1 inch floor, a 4-6 inch mattress, and a little over a 1 inch ceiling it would seem to me that the 4 foot side wall ( according to the plans) is now closer to 3 feet!
Isn't that getting kind of cramped on the inside or am I missing something here???

3 feet does not sound like a lot of room.
Please enlighten the rookie!!!
Thank you