If you are being denied credit by the legitimate lenders despite offering a cosigner with a solid income stream, then there is more to the story than meets the eye.
The lender's willingness to accept a cosigner depends on a lot more than the cosigner's income. The lender will also require that the cosigner be a US citizen or permanent resident, that the cosigner be at least 18 years of age (higher in some states), and that the cosigner have a satisfactory credit history that includes more than 12 months of borrowing, charging and repaying.
A cosigner may not have prior bankruptcies, liens, judgments, charge-offs, or extensive delinquencies of 30, 60 or 90 days on a revolving credit card debt.
Regardless of income, your cosigner can not have a debt-to-income ratio of more than 45%.
It's quite possible to earn $100,000 a year and have $60,000 in outstanding debt.
It's quite possible to earn $100,000 a year and have a bankruptcy in your recent past.
Also - keep in mind that a lender will not ignore your financial history, just because you offer a cosigner. If your history of credit management is extremely poor, the lender may refuse your application, regardless of your cosigner's ability to pay. Remember, the lender doesn't WANT to have to go after your cosigner - the lender wants you to pay. If your credit history makes them really nervous about the likelihood that you will pay, they will probably decline the loan.
Honest advice? (and I know you don't want to hear this).
Work for a year. Make progress on paying down your existing debt. If you can, open a new department store credit account or two, and pay those bills religiously each month. Put some money aside for school. Consider taking an evening or weekend class, to keep your brain sharp, and to provide some academic history when you apply to a full-time program next year.
Might you find a lender who is willing to take a chance on you? If the ugliest guy can find a wife, the ugliest borrower can find a lender. The problem is that you will pay and pay and pay for the risk that you're asking the lender to undertake.
A college education has an undeniable value to most people, but it is only worth a certain amount of money. If you find a loan with an outrageous interest rate, you will pay far more for your education than the average student. It's not worth it. Get your financial affairs in better order, and pay a more reasonable price for your education.
Good luck to you.
Edit: I don't understand why students are so much more impractical when they shop for a college than they are when they shop for a car. Unless I'm missing my guess, you wouldn't go to a Maserati or a Rolls Royce dealer if you were shopping for a car. Why? Because you know you can't afford it. I'm guessing you have a Honda or a Ford budget.
Why can't you apply that same principal to your college shopping? You can't go to a $32,000 a year college because you and your parents can't afford it.
I understand that you WANT to go this college, because I WANT to drive a $250,000 Ferrari. I can't buy a Ferrari, and you obviously can't afford this college.
So you come here, looking for someone to wave a magic wand and solve your problem. "Yes, here is the name of a lending company that makes large college loans to people with bad credit. I used them to go to the school that I couldn't begin to afford."
When someone says "Hey, there is no such lending company, you need to look at whether you can afford this school that you've chosen", you get all huffy, and demand that only people with magic wands bother to reply.
I tried to explain this to you logically, but I can make it less subtle, if you would like.
No legitimate lender will make you a loan that is large enough to solve the problem that you have created for yourself by choosing a very expensive college that you can not afford.