I have started documenting email/text communications, pictures, getting my timeline right, re-reading the agreement we signed and essentially building my case if needed.Regarding lawyers: I have reached out to a lawyer who has advised that trying to negotiate would be better and less costly, to your point @Mike Dymski, than going to court or arbitration.

If the parties can't come to agreement each state runs an arbitration department that can help settle matters or both parties go to court.

I am now working with both title companies, as the house is now under contract, to act as an arbitrator to get the lien waiver.

Just getting started on my REI journey, and recently learned about rental arbitration and it piqued my interest. 

Does your purchase contract say arbitration?

Also, the state of formation is likely where internal disputes would be brought among LLC members, so if you and a partner and/or spouse live in CA, you probably want to arbitrate in CA if the two of you had a disagreement.

Make sure your contract has clauses for arbitration and payment, that warranties are included according to the standards in your state. 

I am in the process of arbitration with the contractor to remove the liens but given COVID-19 the hearing has been pushed back. 

Also, the state of formation is likely where internal disputes would be brought among LLC members, so if you and a partner live in CA, you probably want to arbitrate in CA if the two of you had a disagreement.

With regard to insurance: If the claim is already open and you are arbitrating for more pay out then the cancellation will not affect the open claim.