What Is The Lowest Offset?

[Canadian 32]

I am looking to replace the rims on my car anytime now. I am really looking into Weds sa-70's and 90's and I am wanting to go 8" front and 9" rear, either 17" or 18" ( i am not set on either). My fenders were already rolled when I bought the car, but it turns out with a baseball bat and no heater so the paint cracked and theres a bit of rust. I am thinking of getting a body shop to just cut the excess off, your thoughts on this? also thinking of flaring the fenders as well, what is the usual cost per fender for this?

so the available sizes/offsets are:

17×7.5J 43 5H-114.3

17×8.0J 32・42 5H-114.3 F

17×9.0J 10・20・35 5H-114.3 FR

18×8.0J 36・42 5H-114.3

18×9.0J 32 5H-114.3 R

20 5H-114.3 RR

18×10.0J 32 5H-114.3 R

any opinions would be awesome. thank you