Autodesk offers a of the latest AutoCAD version. No credit card required for the first 30 days. After that, you can sign up for a new trial with a different email (within reason) or transition to a paid plan.
“Autodesk doesn’t care about individuals using keygens.” Fact: They use telemetry in every version since 2015. Pirated copies phone home, and Autodesk has deactivated thousands of individual licenses via DMCA notices to ISPs. Autocad 2016 Activation Key Generator
If you really cannot pay anything, ditch the keygen and use professional-grade that reads/writes .DWG files: Autodesk offers a of the latest AutoCAD version