Yes, it's possible, but not easy. The problem is not going to be ditching the couch in favor of other seats, the problem is what is underneath the couch. There's most certainly a water tank, water heater, furnace, batteries etc. under there. Not all of those things but probably a couple of them. It would probably be a lot more economical to keep searching. There are TONS of vans for sale right now, not to mention mine. I'm not trying to bring attention to my own but I set it up for the same reason, us + 2 small kids facing forward. Check it out for the floorplan if nothing else.
Here's the other problem with getting rid of that couch. It's a double bed. Without it, you can only sleep 2 up top.