Tax Deed Sales in Texas

[Samarn Derrick Vichitnand]

I'm curious what investment strategies people have used with Texas tax deed sales that have worked.  I've never done it before but I anticipate that property with houses on them are bid on with more fervor and therefore end up closer to their market value.  What about raw or developed land for a steep discount that could be used to build on for a rental?  If I were to buy a deed for a home that is move in ready, can I move renters in right away?  If so, what happens if the owner pays within their allotted timeframe?  Does that void the lease or does it stay in effect until it's expiration but need to be turned over to the owner?  Any tips on places that are good resources for researching leins and their order of succession?  Thanks all!