Well remember, your loans are also always growing as well, unless your payments are fully amortized.
I don't recommend most teachers do Teacher Loan Forgiveness. Rather, I recommend Public Service Loan Forgiveness. That's 10 years, but you get total loan forgiveness. And, if you get an income-driven plan with a very low payment, you might pay less anyway.
Not really a fan of doing it. You're shifting the risk from yourself (which, yes, sucks, but there are a lot of programs and options), to your home (with no options except to lose your home).
You didn't say what type of loans you have - which definitely shifts the decision. Federal loans is likely a hard no. You give up income-driven repayment, loan forgiveness plans, and hardship options - like right now during Covid-19 Federal loans are paused with 0% interest. That's amazing.
Also, what if (in the unlikely situation) they do pass loan forgiveness - even partial. They aren't going to offer that on your HELOC. Only for Federal loans.
Private loans are a maybe, but you have to ask yourself if the risk is worth it.