不是以赚钱为目的的算

例如，把破房子改造好了，看看不满意，推倒了，再造一遍，又不满意，推倒了，再造。。。一直这样，改造了一辈子 -- 此人就 Thomas Jefferson, 房子的大名是 Monticello，一共改建了40年。

https://www.monticello.org/thomas-jefferson/a-day-in-the-life-of-jefferson/a-delightful-recreation/building-monticello/

Thomas said, "Architecture is my delight, and putting up, and pulling down, one of my favorite amusements."