Great Video! Since you have the driveshaft that runs through the vehicle, seems like you could put a PTO at front and back. Think of the accessories you could add like winches, snow plow or make it a anti land mine tank, one that shoots a line of explosives out to destroy mines.
Put an fpv system on it. I also using an fpv system on my 1 :10 rc racing Buggy, its much more fun to drive it this way. me and my brother have the same cars and same exact Setup. so its like an racing game, but whith real rc cars, and at the top Speed of 80Km/h its so much Fun 😃 we use waterproof 800w inrunner Motors and encased gearboxes because of mud/dirt. This also helps with durability a Lot.
In real 8 wheel car the second steered wheel pair turns in smaller angle then front wheel pair. If You want steer all wheels by the same angle it is probably better to make first and last wheels steerable.
