Help redesign/modify an Airstream catering trailer to look like an Indian train carriage

We are an Indian street food brand based in the UK, and are building a new catering trailer based on an Airstream. We need to design an exterior vinyl wrap that will make it look like a classic Indian train carriage, incorporating our brand colours (orange, light green and dark green) and company logo. The main exterior elements will be the shutters/carriage windows, plus yellow train signs with arrows pointing to destinations and Indian script. On the interior we want to clad the back wall to look like a train interior, and hang lamps and dress the inside as well. I have crudely mocked up how the exterior might look with our colours (in two colour options) but now need to see how they would look as a proper architectural-style render, including the natural curvature of the Airstream trailer's body. I also need a render of how the trailer will look with the seeing hatch open (see dotted lines on LEFT (HATCH) SIDE VIEW). I will need an illustration of the yellow train signs that will be used to break up the body panels, including the equipment positioned against the back wall, and including lighting. I have included pics of the train lamps we plan to use to light the interior.