Sounds like you’ve got a breach of contract on your hands. However, you can’t just go putting liens on property. You’ll need to sue (unless the contract specifies arbitration or a mediation first) in county court. Of course, I don’t have all of the facts so I can’t say with any confidence the strength of your case. That said, the contract is the key here. I would say it is time to sit down with a business litigation attorney to review the contracts and discuss all of the facts. With that, the attorney will be able to give you a better idea of the nature and strength of a potential suit as well as the process and potential costs. Also, you mention that the contract specifies that in a default (breach), the business (or the personal guarantor) is obligated to pay legal fees. This means that if you are successful in obtaining a judgment, the Court will award you legal fees in addition to the $10,000. From there, you will have to take the necessary steps to turn the judgment into payment.
This answer is intended for general information purposes only and does not create an attorney-client relationship.