I've just watched the "gator method" today.

I'd simply explain they can use Zelle until the renewal, then the portal will be the preferred method.

What are the best methods for finding potential properties outside of the MLS?

Also know that building a home seldom goes as expected - I have relatives that just built a nicer house… they thought it would take 9 months… it literally took 18-24 months between delays in permitting and the builder just not being able to get it done in a timely manner - often due to sub-contractor issues.  

Make sure you know the impact that adding an ADU will have on any rent control. 12) investors seldom include the land value in the overall ADU costs.

My advice is generally: seldom sell. 

Hard to fault her very methodical informed decision.

I also would like to get into the BRRRR method.

Whichever method of lead generation you decide on, aim to establish and maintain a relationship with prospective sellers. 

BP has built a great selection, all of them worth reading and that will help you build foundational knowledge.To answer this one: the words from old school investor Dolf De Roos "seldom sell" and you will find a lot of post on BP from people who regret selling properties in the past.