That would depend on what you have replaced Duncan .
For instance if you use a new oil pump , water pump timing belt , tensioner and iddler pullies that would not be enough .
When i did mine about 18 months ago , i replaced all the above plus pistons , rings , bearings and rebuilt the turbos ( new cores ) at garrets ( $1350) .
Got the rebore , hone and crank reground and cil head done at mates rates ( all for $380 ).
It still cost me around the $4 K mark and my free labour of course .
If he gets it done for $2000 its dirt cheap .