You dont need to do too much to the motor but also depends on what you idea of a rebuild is?
You can get away with stock compression and pistons depending on the power leave your after 200ho isnt hard to do, a good mls head gasket and caps screws for head bolts pull them down to 65 ft/ib you can use the stock cam without an isssue.
As for the exhaust manifold "j" pipes work well and cheap to do the chinese manifolds work ok also Scarles carry them, keep with the stock intake for ease of the throttle etc change the vacuum valve for the booster their a pain in the butt and leak use one off a late model japper doesnt need to be turbo.
Change pump to a evo 1-3 or any aftermarket also change to a larger fuel filter easy job repco carry a good selection, as for injectors if you use the ones from a m42b18 they are lucas high imp 240cc and x6 will support 300hp and will drop straight in.
You can keep the stock ecu/dme and afm to which you can suck through or blow thru the easiest would be suck thru they will also voltage cut at 4.8 volts you can put a bolt stop inside then and set it to 4.7, no need to touch the ignition they dont run a lot of advance so need to retard it for up to 10psi which is over a 50% gain in power.
to control the injectors use an apexi AFC works great easy to use oil feed tee's off the oil sender switch oil return can run around the front of the motor to the high side of the sump use a -3an line and 19mm return.
If you chose to intercool its whatever you can fit into the front doesnt need to be massive anything at this power level is better than nothing keep the piping to 2-2 1/4 inch's for response sake, its easier to use a turbo with a built in waste gate like a evo 2-3 or GTST RB25/20 due to the room issue and external makes things hard.
This a brief over view of ones ive done on a budget if you intend to spend more then aftermarket ecu etc adds to the cost but you should be able to do the whole turbo setup under 2k.
You dont need a bunch of power in the car to wake it up my m42b18 e36 admittedly has good stuff inside the motor but still runs a stock ecu with a mapecu3 piggy back and makes a lazy 270hp and makes fools out of m3 e46 ( well it did the other day the owner got a bit p.i.s.s.e.d was bloody funny) i can add much much more but most like the basic stuff hope thats some sort of help.