It's not free unless you've taken the Historic Trolley Tour and then you can use your ticket to get in free. Otherwise it costs a whole $1.!!! Ha! That's one dollar. Nothing is that cheap any more.
By the way, you also get a free piece of chocolate from the Chocolate Fetish with with your trolley ticket, so don't throw it away!
The Thomas Wolfe House is worth so much more to visit. The tour is very informative. The tour guides know a lot. If you've ever read his book Look Homeward Angel, you must visit the house.