External design and design of transportable boiler house

It is necessary to develop an original / stylish design and design of an emergency transportable boiler house, which will be installed on a trailer-platform.
It is important not only to propose a design, but also to consider / propose how this solution can be implemented in practice: materials, method of manufacture, assembly, installation.
The easiest option is a rectangular container made of siding. This is the most reliable and easy to manufacture design.
But it's too easy. And the option in the style of high-tech or in the futuristic style is original, but practically not feasible in practice.

Background:
Brand colors are gray (RAL 7004) and red (RAL 3020)
The overall dimensions of the boiler house block itself are 12000x2500x2600 (D*V*S).
Appearance and scheme / dimensions of the trailer - in the files "semi-trailer" and "semi-trailer 3D";
A simplified sketch of what will be placed inside and what should be outside - in the file "schema".

The main elements that should be outside:
- smokestack (1 pc)
- staircase for climbing to the boiler room (1 pc)
- ladder for access to the smokestack (1 pc)
- ladder for climbing to the roof (1 pc)
- technological compartment (1 pc)
- boiler door
- a few small windows
- a place in front or on the roof of the boiler room for flexible reinforced hoses

The appearance of such products can be viewed in the files "boiler house 1" and "boiler house 2"".
We have made a sketch (based on the actual size) of how the boiler house will be located on the trailer (see para. File "sketch".

P.S. For a better understanding of the idea of the task, compare 2 photos: "simple and stylish" and "simple".
The same cars, the same materials and colors. But due to the not strong modification of the body of one of them, they look different.