Let me ask you some questions. You need not reply, but do answer them to yourself with brutal honesty:
If something happens and you cannot pay your credit cards, do you lose the house? No.
If something happens and you cannot pay your 2nd mortgage, do you lose the house? Yes.
That known, why would you convert unsecured debt into debt that is secured by your families home?
Now for a more important question:
If you have been unable to keep from using credit cards so far, what makes you think you will stop after you transfer the balances to your home? {remember, be honest with yourself}
When you transfer the balances to your home and continue to use the credit cards, where will you be in 3 years?
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P.S. I'm not judging you or pretending to be any better than you or anyone else. I'm just an average guy that's been there, done that, and seen the results. Unless you're deadly serious about kicking your debt habit forever, a refinance will make you feel better for about 18 months. In 3 years, you will be in WORSE shape than you are now.