Need some Enlightenment

[20comer]

Hi all. My first post here.
1-
I have been reading some posts of this forum and as a future supra owner I have to ask for your help on some doubts.
There is so much wrong info on what path choose when BPU and what BPU config choose to better support a single Turbo conversion...I am kinda confuse in this.
2-
I would like to know a rough estimative for the price of a complete suportive BPU and after, a solid 600 rwhp (or a 500wrwhp for price comparison) on pump gas 100 EU octane fuel(if possible) and everything not engine related you would recomend me for this setup.
I live in Portugal...yeah I know kinda sucks because very few supras around here. Even so I must fight the power and get one. I would like to know if there is any way of putting together this 600rwhp config without handing the car over to some mecanic (dangerous in portugal lol).
One last thing...Do you recomend widebody kits? If so is their instalation hard?
Thanks a lot and so sorry for the never ending post.