To purchase a tax sale do I need a land trust. Do I buy the property as a corporation and then put it in land trust. In Tx 6 months Redemption period is required. What is the best manner to protect the asset 
I think you are confused about asset protection and why you might want it.
Asset protection is derived from the use of a business entity that LIMITS your liability exposure to the assets owned by the entity in the event of a lawsuit arising out of your business’ activities. In other words, when the business entity shields your personal assets from exposure, we say that your entity provides some measure of asset protection.