I was in a long term relationship and lived with my boyfriend in his condo in AZ. We made a number of substantial improvements over the past 2 years to include a bath upgrade, a new AC unit and flooring. The plan was for him to put me on the deed, or sell the property and purchase a jointly owned property. Before he filed any paperwork, he died of Covid. His heirs have given me notice to move out, and will not honor his commitments. Can I file a mechanics lien to recover the costs of materials and labor I put in?