I feel so sorry for you getting stuck in negative equity. Rough calculations tell me you've spent 140,000 of your own money covering the gap between rent and mortgage over the past 18 years. Your return on that has been 70,000 equity. Including 18 years of maintenance that could easily be 180,000 outlay.
You'll continue to pay minimum 8,500 per year to cover the shortfall, plus maintenance, and hope that property prices rise by 5+% per annum just so you can add to that equity.
I think theres a sunk cost fallacy here. You've poured money and emotion and stress into that property and it's given you nothing positive back (not even money!!). You need to sell it, and focus on the rest of your life.
You'll continue to pay minimum 8,500 per year to cover the shortfall, plus maintenance, and hope that property prices rise by 5+% per annum just so you can add to that equity.
I think theres a sunk cost fallacy here. You've poured money and emotion and stress into that property and it's given you nothing positive back (not even money!!). You need to sell it, and focus on the rest of your life.