Will 2000 grafts be enough? (photo)

2000 grafts may never be enough unless your goals and expectation are in line with what a hair transplant may achieve.  This is why seeing a doctor for a consultation is very important. 

Thanks for submitting your photo. Based on it 1200 grafts will not be enough for covering your balding area. Also it can not be covered in one session. First you should have a transplantation of around 3000+ grafts and after a year a second surgery can be performed. Please consult with a surgeon who has extensive experience .

        
Based on the one photo you
submitted, to restore the hairline, corners and a small region behind it you
would need at least 1500 to give the appearance of reasonable density.  The crown on the other hand, is a very large
area and you likely have additional miniaturization going on there in terms of
your native hair.  In order to give you
an accurate account of how much more the crown would need you should seek
another in office opinion which includes a microscopic evaluation.