Looks like you have things heading your way.
I have one thought that might help. And the lawyers can chime in if I am misstating something here.
(In Oklahoma at least), a contractor must notify you in writing before he ever begins work that if you do not pay him according to the contract, he can and will file a lien against your property. If he does not give you prior, proper notification (before he even sticks the first stake in the ground or drives the first nail) he can not file the lien, period. (Well, he can spend the money and file it but it won't attach
)
I have first hand experience with this and my lawyer was the only one in the bunch (including the other side's two lawyers, two other lawyers and a judge) that knew this. Came in handy in my instance.