That's just more art. That doesn't advance the project, if anything it pushes it even further along the wrong path. Artists are a dime a dozen. A monkey could slap together some art assets in Unreal and call it a game (as evidenced by all the asset flips on Steam). What a game needs is programmers. If you don't have any then you shouldn't even bother starting a project.
If I was going to undertake a hypothetical KOTOR remake (and let's call it what it actually is and dispense with this "mod" BS) in Unreal or other 3rd party engine, I would start with a fully functional recreation of the Endar Spire level. Forget about the art assets, simple white box mockups and default Unreal characters would suffice. What matters in an RPG is the underlying systems. If you are starting KOTOR from scratch, you need to develop a multi-node branching conversation system, equipment and inventory system, stats and levelling system, party/companion system, ranged and melee combat mechanics, etc. The Endar Spire is the perfect test level for developing and testing that. You have a couple of NPCs with a few lines of dialogue, a couple of conversations, a few combat encounters, a few cutscenes, etc. all in a very small space comprised of a few small rooms linked by corridors. And if you haven't demonstrated even a fraction of any of that after 2 or 3 years of screwing around, you should just stop wasting your time.