Rolling everything into one lower repayment is only half of it. If the money you free up disappears into day-to-day spending, you've simply moved short-term debt onto a long-term loan — and that can cost more overall.
The version that works keeps the surplus pointed at the mortgage. That's where the big numbers on our client files come from: not the consolidation itself, but what happened to the savings afterwards.
Whether that's realistic for you depends on your income, your equity and your circumstances. This is general information, so the honest answer is that it needs to be modelled on your actual numbers.