Need advise on rims for 2007 tacoma!!!!

Hello all some advise would be greatly appreciated. My 2007 tacoma has a larger front brake caliper and wont fit 16 rims. My options are go 17 which i cant find in steel, or go with spacers. I would go with a 1/4 inch to 5/16 hub centric spacer. The problem is i don't want to shell out the cash for 17 inch alloy rims and tiers. i would rather go with a cheaper 16 inch black steel wheel with a 4 to 4.5 back spacing. So i think with 4 spacers and 16 inch wheels it might end up a little cheaper in the long run seeing as tiers would be cheaper. So i am not sure what to do, any one else have this problem?