Inspired by Bazda im going to share a costing breakdown for my 3sgte build ( some pricing is a guesstimate or been rounded, the loom cost me $923 for eg), Hopefully this will be of some help to people out there.
$650 3sge (st206)
$1400 JE pistons + Eagle Rods
$200 Head Gasket
$2000 Blitz Turbo, Wastegate and Downpipe
$1200 Cams
$2700 Motec ECU (I actually got mine for $1700 second hand)
$900 Motec Loom ( for ECU, With sensors and plugs etc )
$450 Head Kit, Valve stem seals, Springs etc
$900 Exeedy Clutch
$1600 Labour for Head, flywheel, Crank Balance and block honing + fit.
$300 water pump, etc
$250 Water to Air Intercooler
$200 Blitz BOV
$700 880cc Injectors
$250 Gen 3 Intake
A few things i forgot as i clueless on costs but oil pump rebuild and somethings i still need to get ie Air filter, Again the same as Bazda has pointed out a change of turbo here and ecu there you could change the build cost to vary quite easily.
But my build comes in at around the $13,000 Area, also excluding Dyno tuning and some last min labour.