Trailer size to cabin size relationship

Hi there,
First timer here! I am embarking on building my first teardrop based in Auckland, New Zealand.
I am in the process of getting quotes from local trailer manufacturers to build the trailer as I am mostly familar/comfortable with woodworking than steel work and I have a basic question about the relationship of the frame to the teardrop.
I am wondering what is the recommended overhang (or not..) from the frame to the trailer. I am leaning towards having a 50mm overhand on all directions mostly to allow me to get started on the build as the trailer is being built and curious if there's a rule somewhere about this relationship.
Here's some images of where I am at with the design.
The dimensions I have currently are:
Trailer Frame:1452x2600mm
Teardrop Base: 1552x2700mm
Cabin size: 1600x3200mm
Thanks in advance look forward to sharing my build journal!
First timer here! I am embarking on building my first teardrop based in Auckland, New Zealand.
I am in the process of getting quotes from local trailer manufacturers to build the trailer as I am mostly familar/comfortable with woodworking than steel work and I have a basic question about the relationship of the frame to the teardrop.
I am wondering what is the recommended overhang (or not..) from the frame to the trailer. I am leaning towards having a 50mm overhand on all directions mostly to allow me to get started on the build as the trailer is being built and curious if there's a rule somewhere about this relationship.
Here's some images of where I am at with the design.
The dimensions I have currently are:
Trailer Frame:1452x2600mm
Teardrop Base: 1552x2700mm
Cabin size: 1600x3200mm
Thanks in advance look forward to sharing my build journal!