It may work depending on why you're unable to qualify on your own.
If it's due to your credit scores/history, a co-borrower isn't going to help. If it's an issue with your income/debt to income ratios, a co-borrower may help if they have enough income.
I would contact a lender and talk with them. They would be the first place to start. I have several great contacts if you need help!
Joan Patterson, B.A., A.S.P., G.R.I., Realtor
Keller Williams Realty