Have you think about refinance into a 10 years term instead? Home Equity Line of credit ussually, not always are interest only, so you "will" never pay off the debt unless you start meking payments to the principal but minimun payment will be interest only.
Or if you get a second mortgage, go 10 or 15 years, so you pay it off fast and in reasonable payments.
What do you think about it? what is the cash for? home improvements? That is important too.... more