Bills are part of owning an apartment building. There's some that you're scared to open because you know they'll be ridiculously high, and then there are others you know won't break the bank. Ideally, you'd like to shrink—or eliminate entirely—the number of those heart-attack inducing bills, because they eat away at your profits and affect your bottom line.
Throughout most of human history, our ancestors were nomadic, and moved from place to place leaving few signs of their existence. This tumultuous way of life eventually gave way to an agriculture-based society, and ultimately to the globalized world we see today. Without these advances we would not have had the dawn of the very first type of investment – home ownership and real estate.