yeah man just bye an engine already turboed..i done the first engine rebuild and it costed over 1000 with every freashened up..then of course there is the rixk of ur engine nbot waering in properly..likem mine and spun a bearing and now its costed me over 1500 for the engine rebuild..for an extra grand u can get an already turboes engine and stornger internals etc to work with..good luck man
Spinning a bearing is 99% of the time not to do with an incorrect 'wearing in' process. Don't take this badly, but it's probably incorrect (or insufficient) installation
There are problems with building up a turbo engine from an NA engine - con-rods, cranks, gudgeon pins etc can all be slightly different in the NA versions...sometimes just chemically treating the crank can help to prevent the surface from cracking, sometimes it's simply not torsionally strong enough (then you're effed).
From a money perspective - unless you are planning to build an absolute psycho engine and replace every component with something custom - you will always be better off just getting a turbo engine to start with.
You mention that your water pump has gone, I'm gathering that this is the reason for the engine rebuild right? Have you seized the engine totally?
Also when you replace the timing belt, it's generally a good idea to replace the bearings in the idler and tensioner pulleys at the same time. This can add an extra expense, but you don't want those things seizing.
Unfortunately I've lost all the receipts for my engine rebuild, but it came up to around $1000 and I think most of the details are on my cars' thread in the members rides section (check my sig).