Apple is very hard to get approved through. I own a home, have two brand new cars leased (worth about $55k) and have pretty good credit (not perfect) and they turned me down.
You can always try the other options through the resellers, like American Finance loans, but they are not much easier. Easiest is to try and get a third party loan or credit card through a bank or something and do that.
Although, I REALLY try to not finance computers. I go through them so fast that I would NEVER get them paid off before I was ready to buy a new one. So, I try to pay cash all I can. Sometimes I will put it on a credit card if I KNOW that I have the money coming in a couple months to pay it off, but that’s it. debt=bad!!!