Canon 6D+24-15 should be selected, not to say that Nikon D6 is not good, because there are some defects, it will drop slag.
the focal length of 5 mm belongs to the standard lens focal length, and the equivalent focal length only changes the viewing angle, not the actual focal length, and the perspective effect is still the same.
The shed shot also needs a slightly wider lens, which is a standard lens. When it comes to big objects, sometimes the angle of view is not enough.
the wide-angle head will exaggerate the perspective deformation, and sometimes it will have an impact force.
peripheral equipment, you need to buy a shooting stand, 2-3 flash lamps in the studio and flashers. Indoor shed shooting, reflector is not necessary, if outdoor, it is necessary to take the model with you.
You can buy Jinbei's suit in the studio, and TB has it. I wonder how big your product is. Look at the picture, the price is around 2, which is a similar configuration: