cabin house 7x3 with insulating roofing

Specification:

Solid Main steel frame like pic show.

Dimensions: any size 

Panel: 50 Polystyrene Sandwich Panel fully insulated(EPS), black colour outside, white colour inside, thickles of colour steel 0.4-0.6mm

Double Roof System:EPS panel+ colour steel(it use 2 roof to stop leaking)

Floor: 18mm Marineplex plywood 

Base: steel chassis

1pc Aluminium double glaz opening windows and 1pc double glaz Aluminium sliding door