Tax Lien Investment strategy

Here is a summary of how a tax lien occurs:

1. 1. A landlord does not pay taxes due on the property
2. The government puts a non consensual lien (which is a form of security interest granted to secure the payment of a debt) over the property for back taxes
3.  This lien is offered for sale at an auction or at a fixed interest rate 
4. If the lien is sold at an auction there could be multiple investors bidding on the interest rate of this lien
5. The interest will be accrued until the landlord or any other lien holder pays the back taxes. 
6. If the lien is not paid then the investor who purchased the lien can foreclose against the property and therefore own the property for the price of the back taxes.