Wire harnesses

Depends on how much time you have and the reason you have the car. If you bought the car for a project, I would (and did) add my own wiring rather than buy a loom from someone. If you decide to build your own wiring, I can provide you with all the schematics you need
Yeah I have thought about doing it myself but decided I want simplicity more, so I'm going for plug and play route. Thank you