Late 20s, want a hair transplant and need to know how many grafts I would need (photo)

I am in my late 20s and have been balding since 22. I started taking finasteride over a year ago, and while it reversed the balding a little bid (about 20% hair grew back in the bald spot), it’s been stuck at this level for a while.  I am trying to figure out how many FUE grafts I will need if I am going to do a hair transplant surgery to cover this up, and whether I can get this done under $10k in the US/California. If not, I am debating making a trip to Turkey for a cheaper all inclusive surgery. I didn’t include a picture of the front, because my hair somehow hasn’t receded in the front.

Thanks in advance

You need a Master Plan to determine not only what you need now, but what is likely to happen to you in the near or long term future as hair loss is a progressive process.  As you are in your late 20s, I could transplant the crown (depending upon your hair being fine, medium or coarse) the range of grafts would be between 1800-3000 (more for fine hair.