At my club the advertised RPL price guidance is from $12k. This will obviously depend on the student, weather, availability of aircraft/instructors etc. 30-40 hours of flying is typically what I see students needing before their RPL flight test.
I have seen the RPL attained within a single (full time) 4 week block of flying, I’ve also seen people attain it casually over 12+ months.
I flew around 35 hours prior to my RPL flight test, but many of the above-mentioned factors influenced this. I now have a PPL.