Added my 1,000th person to my family tree today. And I still have a couple hundred more that I just haven't gotten around to adding (kids of 4th cousins, distant 1st cousins 12 times removed, etc.)
Where are you getting the information to do this? If I tried to draw a complete family lineage, I'd be surprised if I came up with more than a hundred names. All of my ancestries stop cold at either Ellis Island or the Civil War.
Much of it I had already, after about 15-20 years of work. But I got a subscription on Ancestry.com a few months which helps me search the US Census indices bigtime.
It also helps my mother alone had 27 aunts and uncles, my father had another 16 or so. Just in the family that's alive *now* there's probably 200-250 people. But yeah, it's been a lot of legwork, both my own and others in the family like my great-uncle and grandmother, who sort of brought me into being one of the keepers of the family history. Many, many hours digging through state archives, county courthouses and walking through cemetaries jotting down gravestones.
I still can't wait until my kids are old enough that they get told to go home and draw their family tree for school. Their classmates are going have to these sad little crayon scrawls with like one or two generations, and my kids are going to drop some Bayeux Tapestry-looking shit on them.
My wife and I have enough ancestors in the Civil War that I have in fact found battles where her ancestors (Yankees) were quite possibly shooting at my ancestors (Rebs), and vice versa. Thankfully, both sides must be bad shots. If I go back even further, I can find where some English ancestors were fighting Scottish ancestors (and they were themselves distantly related).