How many hours
In my opinion plan on 35 hours for an RPL and the same again for a PPL. i.e. total about 70 hours.
Take off 20% if your flying fulltime.
If you cant afford that, don't start, and don't forget to allow another $2500 for RPL and $2500 for the PPL, for other costs, (theory, medical, maps, charts, ASIC, books etc)