With that’s said they’re not technically saas (recurring payments for software service) but rather just various businesses in industries across the board
the most money is made doing the mundane from what I've found. The industries that aren't glamorous.
Also, my friend group, all entrepreneurs, have similar results.
I don't know this guy... and if you can get get over his unpleasant "guru" angle... go look at the creator of RemoteOK. He repeatedly creates businesses that succeed over and over, using the same formula.
A FOAF made millions (maybe 10's of millions) importing/exporting heavy machinery with basically nothing more than a phone.
You have to know where to look, and what trends to pick up on, and after that it seems quite easy, albeit hard to explain as a process. Or something I could repeat on command. It's very timing dependent, dependent on consistent trial and error, and you need to be surrounded by people who are on the same page where you can work together very quickly when you see something that might be a success.