Last summer I was hired as a subcontractor to perform about 90 commercial roof inspections using a drone, an rgb camera, and an infrared camera. The end client is a very large commercial real estate and property management company. I have only been paid about 75% of the contract's total value. Up until a couple of weeks ago the company that hired me was saying I will get paid in full when they get paid. I sent an email inquiring about the situation yesterday, and now the company who hired me says I must talk only to their attorney. I do not know if the end client has paid the company that hired me. I sent an email to the end client trying to find out if they've paid the company who hired me, but I'm not sure if they're going to respond to me. I would very much like to file a mechanics lien, but I'm not sure if the law allows me to since this isn't a construction situation, per se. The roof inspections definitely have to do with the properties' maintenance and upkeep.