I just completed my RPC to RPL conversion yesterday. Took 3 days, 10hrs of ground schools/ briefings and 5 hrs of flying (incl 2 hrs of instrument flying and x-country).
Once I receive my RPL, I must still do a flight review and complete my 172 endorcement.
My plan is to proceed onward to PPL. The cost has been a real shock to the system and makes me question if it is worth it. My cost for RPC to RPL so far; Medical exam $280, processing fee $75, english exam, ASIC $234, foreign police checks $500, plane rental $756 (thankfully tach time), instructor $2316, still have to add the cost of C172 endorcement, flight review and controlled airspace endorcement...