Also, it appears that his contract for deed /land contract is set up in such a way that all he would have to do is evict if they stop paying.. we’re talking thousands of dollars for foreclosure over here and then we have to evict  them through the court system so we’re talking four months easy on the low end to recover the property.

If the seller files bankruptcy in the future you have to prove to the court that you bought the house fairly.

@Minna Reid  5th amendment comes into play.  5th amendment also has limits by interpretation of the courts.  

What else should I consider taking to court?

They won't want to go thru Civil court and the timeframe.3. 

One other thing to keep in mind (which may or may not apply in TX), but in Ohio, a property owner can represent himself in court for an eviction action.

Although that route does have risk as there could be collusion at the court house steps and the property does not get bid up like it would have if the local good ole boys and girls were not colluding to keep the bid very low.. ( ie paying walk off money).. 

It was forced into bankruptcy court.

Lease or no lease, if they’ve got utilities, mail, or...even just been in place past that threshold—they’re protected.The courts are overloaded, and tenants get free attorneys. 

My humble advice to anyone attempting to do creative finance is:Creative finance is for experienced investors who have access to capital if anything goes wrong.Learn the lawsDon't use a contract "off the internet", laws vary by state and are also regulated on a federal levelLearn the financing techniques correctlyDon’t skip parts of the processDon’t ever do a “kitchen table” closingUse the proper deedAn attorney can help you with the legal work, but the rest you are on your ownYour guru will not bail you out“Investing” in someone else’s deal by providing a small 2nd loan so the “investor” can pay for “cash to the seller” and for “closing costs” so he can do the deal is a very bad planKnow what problems can ariseLearn the responses and solutions to problems before they are neededKnow everything there is to know about Title and what that meansKnow who a "protected class" individual isLearn the "back doors"Learn human natureUnderstand timelinesUnderstand regulation enforcement (some of these "mistakes" have a 10 year statue of limitations ( they can charge you 10 years AFTER you do the transaction) and carry hefty fines and possible imprisonmentThe court doesn't accept "I didn't know" for an answer"Know that the source of the lead plays a serious role in some states and federallyKnow how much of a "profit" pushes the boundaries to invite an investigationYou can be sued by the seller if you don’t do things correctlyYou are automatically at fault if an investigator or attorney or regulator gets involved.