I thought the HSI on the PT6A-114 was around 1,750 hours (half the original 3,500 hours TBO.) I don't think a quote for $33,000 will include an HSI?
Even with trend monitoring I doubt Dick can get an extension or on condition, with annual utilisation so low. But if his cycles per hour are very low and the engine had regular compressor washes, for the first HSI he may get away with a C section split and visual inspection?