I do not understand the logic of the tent.
It isn't hard to black-out a room, so I can't see an advantage to using the tent indoors. I have blacked out rooms in my parent's house when I was growing up; blacked out dorm rooms at university, blacked out apartment kitchens and presently use a blacked-out bedroom. For printing the black-out requirements are pretty modest. I often printed in the mostly blacked out kitchen with the living room's sliding doors open to the night air.
If you need in-the-field prints then I can only surmise it is a commercial enterprise and surely a digital camera and a printer (and a power inverter, if needed) are the way to go.
A source of power is a must - for running the ventilation fan, the enlarger, the safelight and other accessories. Either run a long extension cord or carry gel-cells and an inverter.
Making prints usually requires running water nearby (either water running through a pipe or the photographer running with a bucket). Stabilization processing makes some sense, but it has no benefit to a customer over an ink-jet print.
As for developing film in the field to insure you got the image - all you need is a changing bag and a daylight tank (used in real natural daylight, imagine that).
It makes sense for wet-plate/tintype photographers where an on-site darkroom is required. But Ilford, TTBOMK, doesn't make or sell wet-plate materials so I'm not sure how this fits their business.
The tent can't be made using Ilford's present manufacturing capability. This makes less and less business sense. I imagine someone developed the tent and approached Ilford to distribute it for them.
The Nova tent isn't carried by B&H, which says something about demand for it. It also costs ~$750-$1,000; decidedly a specialty item.