Dick. I think we had this same conversation a number of years ago when your 'Van was near new?
Your Caravan is on a Cessna system of maintenance that anticipates - from memory - four cycles at 125 hours per cycle, within one calendar year. That you have only flown 50 hours in the past year does not exempt the aircraft from requiring all four maintenance cycles (equivalent to a minimum of 475 flying hours) to be completed in 12 months.
If you've only flown 50 hours probably none of the maintenance cycles have been completed, hence you are now up for all four cycles at the obscene cost of $33,837? Are there any calendar time limited components that must be overhauled or replaced? (Fuel nozzles, starter generator etc?)
Talk to Cessna and ask if they have a system of maintenance more appropriate to a low hour private operation.
Or take it off the Cessna system of maintenance and have another more suitable system of maintenance developed and approved by CASA. Good luck in getting CASA to approve that revised system of maintenance..........