I had mine rebuilt with oversize Arias forgies, new bearings etc, honed, crank cleaned up (it was scored)... basically a complete recondition, with new water pump, whole lot got a fresh coat of paint etc etc... minus the in/out labour it cost it was about $4,000... plus if you can help out with the labour or can get mates rates on removing and stripping the engine I can't see why for $6,000 you can't get a drive in, drive out package... and a totally fresh forged engine!
If you are clever about it you might even be able to squeeze some cams into your budget;)