27 with receding hairline since early 20s, Fue Hair Transplant candidate?

Noticed when I was 23 hairline was receding even with very thick hair. On Fin, min 2 years Am I a good candidate? How many grafts would I need to slightly lower the hairline and fill the corners in a natural manner? Being 27 with hair minimization still occurring around hairline, what will happen if after a transplant the natural hair still recedes? Would the crown likely to thin out over time? I hate my hairline but am worried about the nature of getting a transplant then balding later in life