I'm at 33% of the 20b job and I've been at it for about 4 days now, so yes you can complete it but it will take a while!
The job takes awhile no matter of stats. A lot of people have completed it at 100kcs and lower. It just takes a lot of patience and being consistent on it. You will fail many of times, so don't let that discourage you, you most certainly can complete it.