I might not be the target customer in this case. But I'm not sure how a professionally designed interior is a good option for saving money. I'm cheap, so my first choice is looking for quality used furniture off of places like craigslist. I've gotten some pieces I'm happy with.
But the issue with furnishing an empty apartment that way is that it takes longer to find pieces, especially if you want it to match. My assumption is prices would be more than retail at a minimum. I'm also not usually comfortable with in-store financing offers. They usually aren't a good deal. But your terms could be good, debt seems to be cheap right now.
This does definitely sound like something I would be interested in though if my place was empty and I was happy with pricing.