If you think to take bad credit car financing against a car that you decide to buy, you must find a loan that will fit within your budget. You must suffer from bad credit score or have average credit score.
After the rise of the subprime loan lending and the lenders are agreeing to lend more high-risk loans, availing loans is no more a problem. Though you might have bad credit score, you can get a loan after removing the basic errors from the credit report.
What matters are the monthly payment and your ability to pay it. Yes, you have to make a budget on the payment against the car loans. You have other utility bill payments to make every month and if other bills add up to it, you have to analyze how much you can spend on each of them.
Check out the term of the loan you can afford as it helps to make a firm budget plan. If you take a long-term loan, the monthly payment lowers, but you have to pay more amount of interest than a short-term loan. In a short-term loan, the monthly payment is high but saves your extra payment.
So save your money against your loan.