[Fred68]

The M47 engine isn't a bad engine when it's working. It's when you get problems they get expensive. Injectors are known to fail, listen for a slight misfire at idle. The crank damper can fail causing a clatter until it breaks up completely. If the clutch fails you'll need to get a new DMF at the same time, it's also worth changing the slave cylinder while the box is off.
The lower engine tie bar is a known week point but an easy fix.
The EGR valve can fail but that is common to most diesel engines.
The good news is there isn't a timing belt to worry about.
It's a nice engine if you are a derv person.