Free Download Autodesk Fusion 360 Full ((top)) Version -
If you run a (less than $100k annual revenue) and are less than 3 years old, Autodesk offers a heavily discounted or sometimes free Startup license. The program has changed over time—currently it offers the full commercial version for up to 80% discount (not fully free), but occasionally free 1-year grants are available via incubator partners.
By following these methods, you should be able to access Autodesk Fusion 360 without paying a dime (at least, temporarily). Free Download Autodesk Fusion 360 Full Version