I must admit that this is very complicated job in terms of confirming data, but I have had even more complicated experience when a client asked to gather info about ALL previous companies where more than 20 000 employees worked before. I used LinkedIn, Facebook and other social networks to accomplish that task.
I would estimate your task on 7000 * 5-10min = 1100h (I am sure it will take much more time), my rate is $3/h = $3300. I can agree to do this job for $1650
#1 and #2 – are most complicated because it requires research.
#3 and #4 – can be done ease, because I can write scripts to clean up all data
Let me know if you are interested in my offer
Thank you, Manahil
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