I'm no lease guy, but have you considered using the Lease Cash as an option? For the GT1, it's $5,800... Get the dealer to knock off that $1,000 and that's $6,800 you are now playing with.
What the "lease cash" (from Kia Financial) does is lower the MSRP. The GT1 MSRP is USD $43,250 - $1,000 + Lease Cash of $5,800 = $36,450 (which is called the Capital Cost).
The "Residual Cost" is 53% of MSRP: $22,923
The difference between the Capital Cost (your negotiated price of the car) and the Residual Cost is what would be financed in a 36 months loan. The interest rate (AKA money factor) for the 36 months is .00200%. You must multiple this by 2400, which means the rate is a horrible 4.8%. Thus, $404 a month for 36 months is your payment (financed $13,527 - the difference between the Capital Cost and Residual Cost). The outlay is $14,551. Thus you paid just under 1k in interest.
Now, there are a few more steps, a few more fees, which can add to a total of $2500 - $3,000 total, but in no way does it add up to the $4,800 they are giving you.
I just attended the Portland Auto Show and a local dealer said I can do this, and I can do it same-day. Lease and pay off, then purchase.
Only about 2% of people do this, maybe less, because no one really understands this or knows about it or thinks to take advantage of it. It's certainly a LOT more complicated, but you can even get $7,200 lease cash back on a GT2 AWD, w/a residual of $52%.
Some of this is negotiable. I believe the "reserve" interest rate of .0004% (about .96%) is what is baked inside the 4.8% rate and is bank the dealer makes, or can dicker with to lower the monthly rate.
Hopefully this massive lease cash deals continue. A 2.0L Premium has a $6,700 in Lease Cash. Wow.
80% of people just lease and look to get the lowest monthly payment, not understanding how to negotiate that or anything. Just lease 30-36 months, turn in the case, rinse and repeat. Then they take that car and re-lease (Mercedes dealers do this all the time... Ugh..) or finance to purchase as used. Wow.
NOTE: The lease programs also finance the residual cost of the car and bake that into the first 36 months I believe. Ugh. No wonder banks LOVE leases (often called fleeces).
My understanding is come programs want you to hold onto the lease for most of the term (or you'll get bigger fees), while others vice versa. So you'll need to understand the paperwork.
I'm waiting for this fall/early winter to see what's on the lots and what kind of - hopefully - aggressive programs Kia Financial comes up with.