Listen, an alcohol injection system is basically a pump, nozzle and tank. The simpler it is kept the easier it is. If you have the ability to install a car radio..you can do this.
No matter what route you take..they all lead to the same river..pump,nozzle, and tank. The debates are how to control the pumps. Both the prefab kits like the SMC, DIY, and stuff I do are all going in the same direction. They all require wiring, drilling, mounting stuff. The experience and technical assistance available on this board cannot be surpassed by any other web site.
If you do your reading and spend some time visiting sites and articles..you will get a grasp on line 1
The complications happen when you break into the 11's for power.. Thats when the power is really being made and requirements are higher.
Decide what you would like the car to do..then make a game plan how your going to take care of that issue..thats what this forum is for. To give different views on the same thing. I too had your feelings initially when I did mine 2 years ago..so i understand.
There are pro's and cons to every way you decide to go about doing this..they usually revolve around $$$ and convenience
And just added..you can do this with your scanmaster..as your end result of 02's will vary with fueling. Your looking for zero knock and a happy motor. Direct scan/turbolink are needed for extended diagnostics. like making chips..