For lenders, I have access to private money lenders or if you want to go the traditional route, I recommend checking out Coast to Coast - Jeff Weller. 

Since traditional agent training doesn’t cover investing, supplement your learning with books, podcasts, and investor meetups.Good luck!

Its more transactional than a traditional sale so you want to find out who the decision maker is and negotiate with them.

In my experience, using a hybrid model—combining traditional realtor showings with self-guided tours—has proven to be an effective strategy.

@Neil Smith,Yes, Traditional IRA can be rolled into Solo 401K.

Maybe he's the exception.But the good news is - no matter what you do, if your brother just leaves it all as "passive" and doesn't mess with anything, whether short term rentals, or traditional rentals - the right tax planning could mean a box of his investment dollars that is effectively able to grow tax free. 

Financing options do exist: hard money loans, renovation loans, and some traditional mortgages can be used on distressed properties if criteria are met.

And yes, that’s half the type.They miss the other half, which is not only active investing, but in many ways mirrors equity investing more than traditional debt investing.

Do you personally use traditional financing with BRRRR or do you pay for properties with cash?

I offer a traditional coffee pot for guests who drink a lot of coffee, a single cup pour over cone, a Chemex and even a Bialetti at my properties.