If someone has a stable income but bad 500's credit score, is it a good idea to co-sign?

by Jon Haynes Photography
Question by ShawnieLovins21: If someone has a stable income but bad 500's credit score, is it a good idea to co-sign?
I have good credit and can qualify for a $ 100,000.00 home on my own but I want to buy one for $ 225,000.00. With our income combined we should be able to buy a house for that amount. However his credit score is in the 500's. How will this affect our loan/mortgage?

Will we still qualify for the loan?

Will interest rate go up or have to pay

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