All of that is applicable to any self employed person.  I'm a plumber with a wrench.  There's only so many hours in a day.  Yada yada ...

1.) Stop spending so much money!

pfft, I stopped following them last year because it seemed like nothing more than a boys club that liked to talk about new gadgets. I'm sure plenty of their revenue comes from advertising and endorsements, so this advice is amusing, and like, derrrrrrrrrrr. this is one realm where men are the suckers.

which leads me to
6.) Find a spouse with a good job.
back off, that's our trick! 

Find a spouse with a good job! My spouse does have a great job with full benefits!   

basically, these rules apply to a lot of other fields besides photography- I know a few construction folks that have the same situation.

It's not so much about building wealth as not letting it seep away, which is good advice in any field.

In my relationship, I'm the sucker with the higher paying "great" job that means I can't afford to quit and tackle photography full time right now, as much as I'd want to.

(I fully appreciate that "afford" is very much relative. Technically we could afford to eat and house ourselves if I quit my job.  But we'd be giving up a lot of other comforts and pleasures and I'm not prepared to trade in everything else for photography.  Yet.  I admire those who do take this leap.  Still, maybe in a few years when the mortgage is a bit lower... *dreams*)