With an aluminum deck and 2-cycle engine, it's actually (or should be) pretty light.
I have a similar model. Parts can be found but not easily and they are somewhat expensive. Yours is the professional model with a big fuel tank and probably has a blade clutch as well.
These engines are known for developing a 'Suzuki' knock. Yours may or may not do this. If it does, it will sound like a horrible rod knock and that it's going to fly apart at any moment...but it won't. Mine's been knocking for at least ten years, maybe more. Nobody seems to know for sure what causes it.