There's a guy who does a financial/legal advice show on a Boston talk station who had a call about this very subject last weekend.His reply was to discourage the caller,calling these plans "very risky".
FYI
Did he say what the "risks" were. The only concerns I see are how long the county will run the bill until the property is up for sale. The sale is usually below market. You may be able to afford a property manager and still make money on rent or use a realtor and sell.
It's my understanding that most of these result in the interest being paid by the owner, rather than the lien holder getting the property.