I think your maths are wrong.
1 x 1" x 150,000 = 150,000 inches / 12 = 12500 feet.
Assuming he stacks his books 7 high he would need 1785 feet of wall space
Devide by 4 to square the area he would need a room or rooms 446 feet long by 446 wide.
So he is a very rich guy. He can afford a house that is 3,000 sq ft. We must add windows, doors, cupboards, space for his computer, etc. If he lives in Newport Beach CA, San Fran, Manhattan. This is one very rich dude.
But hang on I've just figured it out
He's a bum, he lives in the local library and uses their computer to surf the net. Will remember this when he rubbishes me. I'm assuming he has every one else does.
