It's bad.
The hole is so big that it is not something that can be fixed with just a patch. The hole behind the glovebox actually gives access to the cavity in the front fender. I've never seen a hole there that big. (Pic with green circle)
The rust also came out on the other end, as you can see in the pic with the red circle. There, the visible rust was fixed. I doubt if the layer below, which must be worse, was fixed as well.
In order to fix it all properly, the fenders need to come off. When you're doing that, it means a respray.
When you're respraying ( around 10-20k usd seems to be a normal going rate), doing the whole body isn't uncommon.
In this case ( but also with the majority of other 'unfixed' e9's ), the rust is everywhere. Expect to need new floors, doorskins, rear valance, rear quarter panel lower patches, front fender lower A-pillar patches, new sills etc. The whole lot. That's 10k in sheet metal alone.
The front fenders look like they have rust issues, though fixable with skillfully welded patches; no need for full NOS fenders.
Outsourcing just the body work would be 50k at least in the US.
The BAT offer basically is a whole resto project where the value lies in the parts, not the body.