Bro the heloc is added debt to your mortgage. I think the safest play right now is not to add more debt.
In terms of price and real estate market fluctuations , you risk making your mortgage higher than house value by borrowing against it right now.
You say you have 200k in equity and wanna borrow a hundred. Making it now only 100k in equity. Based on what’s happened That’s about .25% interest rate hike for that to get wiped out.
Of course Unless you are in it long term. Than all this doesn’t matter and go for it.