[22M] Should I go with Forehead Reduction Surgery or FUE Hair Transplant? (Photos)

My hairline is naturally high (8cm). I would like to lower it by 1.5-2.5cm. I have minor temple thinning, but after 3 years on finasteride my hairline hasn't moved. Would forehead reduction be possible if I could hide scarring with laser scar removal / hair grafts? What would these procedures cost in combination? Alternatively, for FUE, how many grafts are needed to lower my hairline to match my current hair density? Would there be sufficient grafts if follow up transplants were required?