1
general::
In a secure or comfortable position, especially because of being certain to succeed. For example, Once I meet the schedule I'll be home free, or I think we have enough support for this measure? we're home free. This expression probably alludes to safely reaching baseball's home plate, meaning one has scored a run. [Mid-1900s]
American Heritage Idioms
2
general::
Phrase(s): *home free
safe and without problems. (Not necessarily about home or about money. *Typically: be ~; get ~.) • Everyone else had a lot of trouble with the bureaucrats, but we got home free.
McGrawhill's American Idioms And Phrasal Verbs