I find it hard to believe that a shirt before 1750 would cost $3,000 in today's money. Very hard to believe. Also, I see nothing wrong with owning hundreds of books. Especially if you homeschool the numbers add up quickly.
I began my journey toward minimalism about 6ish months ago, and I am IN. LOVE. With clear surfaces, a home that nearly always looks clean (even if it isn't), and enough empty space to just breathe. I firmly believe that our culture has a purely stuff problem--NEVER a space problem. Try it. Dare you.