So I've decided on getting a john deere. I was looking at the Z445 which is a residential. It's price is $5099 with 0% financing for 12 months. But then I stated looking at the commercial ones. The Z920 is $8475 with 0% financing for 42 months. Both will be the 54" deck. I was gonna go with the Z445 but I started thinking and with 0% interest for 42 months that sounds like a good deal. What do you guys think? What's your opinion on these ztr's?