It's VERY common that title has exclusion of mineral right and no effect whatsoever on resale value, eg: Los Angeles County. 

Typically, the entity that is created for the deal will own 100% fee title to the property subject to any assumed or originated secured debt.  

Seller closing costs:CommissionTtile insurance Transfer stampsClosing/escrow fee if a cash buyer is involvedMisc title company feesUnpaid real estate taxes and tax prorationsAttorney feesHope this helps.

I don't see where you called out your costs to sell the property (commissions, sellers title, etc.).

Once you've done enough research on property the next step would be to do a title search 3-5 days before the actual auction.

I called my buddy at a title company and asked him to run a search to check if the home was owned free and clear (which I assume it is).  

Situation: Mother passed in '07 and no one knows who is on title and who has rights to her property.  

Texas is a title co closing state not an attorney closing state .. so not sure why you would need an attorney...

Will title be clear?

Let me start with this:in HUD's Single Family Housing Policy Handbook updated in 2015 it says this: (Straight out of their pdf edition on the website) (i) Time Restriction on Transfers of Title The eligibility of a Property for a Mortgage insured by FHA is determined by the time that has elapsed between the date the seller has acquired title to the Property and the date of execution of the sales contract that will result in the FHA-insured Mortgage.FHA defines the seller’s date of acquisition as the date the seller acquired legal ownership of that Property.