I used to own an apartment building a few years back. They were nothing like the ones in today’s jigsaw puzzle, though.
It was a two story building with six apartments in it. We spent a ton of money on it fixing it up, only to end up selling it at a loss.
I did learn a lot when I owned them, though.
Enjoy the jigsaw puzzle, and please share my website with your friends!

Beginner   Easy   Medium   Hard   Tough