2 strategies when buying Tax Liens ?

[George P.]

I can see two major strategies in Tax Lien investing:
1. Buy tax liens hoping to get interest - to do so, look for financed properties (so that the noteholder will pay the taxes).
2. Buy tax liens hoping to foreclose on some of them tax liens. If this is your strategy, what are looking for in a property when doing DD? I.e. absantee owner or long-term ownership?

Please chime in ! :D