It's unreasonable for a building to last only 20 years regardless of price. I work in a nearly 100 year old building and live in a 120 year old house. Even a mo

It's unreasonable for a building to last only 20 years regardless of price. I work in a nearly 100 year old building and live in a 120 year old house. Even a modestly-priced building of that scale should last many decades.