Ok. If there is not enough collateral for you to seize and liquidate to generate enough cash to pay off the loan, your only real option is to sue on the note and obtain a judgment for the amount owed.
Once you get a judgment, you can try to attach any property owned by the debtor, garnish wages, bank accounts, etc. in order to collect.
You will have to sue in County Court given the amount of money you're seeking. http://126.96.36.199/search?q=cache:ZSpifjup35EJ:www.courts.state.tx.us/+court+jurisdictions+in+texas&cd=1&hl=en&ct=clnk&gl=us
You can file suit on your own, but my suggestion is that you hire an attorney. It is likely that your note calls for attorneys fees to be paid if you have to sue to collect.
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