Lots of good advice being giving. I would like to add a little also.
If you do not have extra to put down on the Elio right now, then wait and save. With the production numbers being proposed you will only be a few months behind those who went All-In a year ago. That is a few months more to save up the price of the Elio.
Now the math: Assume you wish to save up $7,000 rather than borrow $7,000. If you, and anyone else with bad credit, have to pay WAAAAAAAYYYY high interest rates on that money, then your monthly payment will be very high. Instead, make those payment to yourself now and save that money before you get the Elio. I would recommend that you check with your local Coin Store as to their buy/sell rates before doing this, but think about buying silver coins every paycheck and saving these. Then when it is time to take delivery of the Elio, take the coins back down to the coin store and sell them back, or sell them to another collector. Not too long ago a friend from the office was talking about selling a gold coin to buy a new computer. I told her not to, but if she insisted, I would buy the coin from her. Even though I offered her more, she sold it to me at the coin store's buy price, so I got a good deal on the transaction. You may be able to do the same. One thing that we do know is that silver will not earn you interest, but in two years it will be worth more.
$7,000 divided by 100 weeks (one year 11 months) is $70 per week, about $300 per month. If that is too much, the half that, $35 per week in silver coins will give you over half the purchase price, and the rest can be financed using the gas credit card, even with bad credit. Remember, $70 per week is only $10 per day. Try to find ways to save those little things and it will add up.
To sum it up, why wait to make payments, make them now and pay yourself the interest.
I like the sliver idea. I prefer to invest my money in "Smith & Wesson" I have made way higher returns in my hobby than anything. I have been thinking of buying silver simply because i cant afford gold.