The Cheapskate’s Guide to Retirement

https://getpocket.com/explore/item/the-cheapskate-s-guide-to-retirement
look at every penny, of course. 

18 favorite financial rules of thumb (and some useful money guidelines)

https://www.getrichslowly.org/financial-rules-of-thumb/
Some of these are off by 2x according to my back-of-the-envelope calculations, but a useful starting point.

How Much Money Do People Have?

https://priceonomics.com/how-much-money-do-people-have/
Wish they had better/wider age breakdown. 

The Most and Least Expensive Cars to Maintain

https://www.yourmechanic.com/article/the-most-and-least-expensive-cars-to-maintain-by-maddy-martin

10-year study on most and least expensive #cars to own. Hint: Toyota.