If one of your family members has good or excellent credit, ask to become an authorized user on one of their credit reports. As an authorized user, your relative’s account will be added to your credit reports. And as on-time payments are made, the resulting positive information will help to lessen the impact of your past mistakes. That will lead to credit-score improvement.
That's very commendable of you to handle your daughter's financial problems that way. I used to be employed as a loan officer in finance, but things have changed so much in the last 20-30 years. I accomplished something very similar to her situation, but I started in the fair range on scoring. I raised mine 204 points in less than 9 months. Thanks for passing along this great advice and experience.
Other ways credit card consolidation can hurt your credit include applying for a new line of credit which will result in a hard inquiry on your credit report, adding a new credit account that can lower the average age of your credit history, and getting a new personal loan. All of these things will show that you have a high level of outstanding debt (your scores should improve as your remaining balance shrinks from where it started).
With poor credit, you may not be able to get approved for new credit products like credit cards. Although you may still be able to take out an auto loan or a mortgage, you’ll pay a much higher interest rate because of your low credit score. Compared to a borrower with good credit, someone with poor credit can pay $50,000 more in interest on a mortgage. Over an entire lifetime, you could end up paying over $200,000 more in unnecessary interest just because of bad credit.