Lots of work, I can put a turbine in one for $35 grand,
But owners add puff & Bling Bling ( $$$$) & you can put in $100,000 in a kit
, But a flying nonwrecked Rotorway for $30 -$60 grand isn't bad,
Remove the belts & put a real engine,gear box etc & you'll have a real helicopter, If you keep the origanal stuff see about 100 to 150 hrs between maintenance.
It flys nice, but used issues will raise its ugly head.