Required:
X Brand Twin Turbo
X Row Oil Cooler
Engine Oil
Injector Set: 6x1050cc
Oil Cooler Block off plate (for colder climates)
Uprev Fees and Tuning
Coolant
AFR/Boost Gauges + Mounting

Good to do sooner then later:
OS Giken Twin Plate w/ Damper
Lightweight Flywheel
Clutch Slave Cylinder Upgrade
Oil Psi Gauges

Additional Performance:
Test Pipes or HFC
Catback Exhaust

Important but not required:
Motor + Diff Mounts
SS Brake Line Set
Brake Fluid RBF 600 or 660
Brake Pads CarboTech XP10
Slotted Rotors 2 piece if you want
LSD (Quafe or OS)
Exhaust Heat Wrap
CJM Fuel Starve Control
CSF Radiator
Gear Oil for Diff
Suspension
Tires
Wheels

Some things make sense to do with the other while others can be done independently with little change in costs for labor.

The other catch is your resale value. Either you part it out and eat the labor cost again, or struggle to sell a aftermarket turboed car. If you have doubts about keeping the car long-term, it may not be something to do.

I'm keeping my car until she dies!! Depending on how she dies, I may resurrect her.

If you plan to keep her for a long time, then here is a plan I would advice that gets you to boost.
Get a DD if you do not have one, pay off the Z and while doing so have some fun with adding these parts.
-Upgrade the radiator
-Brakes (when OEM parts wear)
-Exhaust plus HFC/TP/etc

Once you save for a bit and go down the line the entry cost of boost will be a little lower as you will have made some upgrades over time that will benefit the FI kit along with decreasing the sticker shock. Plus you can always pick up the kit and then over a few more months buy up gauges, clutch, etc and then have a big install month. This way you are not dropping 15k in one month.

Sashas kit is so complete I still say it is the least expensive and best way to boost the Z, plus the turbo is not in the engine bay, keeping a lot of heat off the motor, this is a big plus. Regardless that it is a single it spools mad fast.

My Nismo i my DD. I don't believe in garage queens. Buy it to use it. My car will more than likely be paid off this year.:tiphat:

As it stands, I will be getting CBE (probaly FI) in a few months; then SS line, brake oil,and pads whenever they wear out. If I do decide to go FI, clutch/flywheel a few months before receiving my kit.

Anyhoo, thanks a million guys/gays for the food for thought. If any of you houston people want to hang and talk shop or school me, lmk. I'm almost always up for it.