Victa Parachute dropping ops are a good way to break the 500hr barrier. I have employed many pilots from that background and most of them are now burning kerosene.
You will need to set your own standards and work at maintaining them as the very nature of the operation is not conducive to professionalism. Often, check and training is required to remedy the tendency to throw an aeroplane around, and you don't get much practice at landing with a full load.
Unless progression to multi-engine ops is highly probable, don't stick to it for long as too much (more than 500hrs of it) is seen as a negative due to the need for retraining to professional standards.
This is not commercial ops and though you will have high time, you have the same problem as instructing too long, no experience in all the aspects ( flying as well as paperwork etc) of charter flying.
At 500 hrs you should be able to find work as a s/e scenic pilot where you will start the induction into commercial ops and you will normally progress to charter line pilot after a hundred or so hours. When you get close to 1,000hrs you will probably score your first multi work and then that snowballs to working for one of the bigger charter operators and before you know it you're burning kero.
Hope this answers your questions.