We did renovations for an apartment complex for 3 years. We tried to raise prices last year, so they found someone cheaper. We did not have a contract, but renovated over 200 units. I sent them an invoice for materials on cancelled units, and complex specific materials ordered for this job. The management company hasn't responded to my emails. My 20 day window expires tomorrow. Can I lien them today? Approximately $30,000. I offered to ship the materials to their complex as well.