Often times when a builder/buyer moves too fast, or is too busy and overlooks a key piece of due diligence, the unethical ones will try the "scorched earth" method and blame everyone but themselves, even when they know it was their own mistake, and they'll see if they can scare you, the seller, the title company et al into paying damages/fixing their problem. 

Perhaps they invited Jerryll based on his extensive SEO knowledge and did not look into his questionable marketing methods and extremely high course pricing at $5800 and $19,800. 

Bandit signs, cold calls/texting along with direct mail is the method most people use.

There is much to learn: pricing, marketing, screening, contract law, lease enforcement, late/unpaid rent, property abandonment, squatters, maintenance, tenant neglect or abuse, communication, and 417 other things.Buying a decent property but not managing it well can impact your finances, marriage, sanity, physical health, and desire to invest.

The BRRR method is not about "numbers working" in a given market. 

Additionally, are there any other methods, approaches or strategies you’d suggest for someone just starting out in this space?

Find Brandon's videos on YouTube for the "four square" method of analyzing homes and practice.

Make sure you understand their timeline for funding—speed can be crucial for flips—and their experience with similar projects.Look for a lender with clear communication, transparency, and flexibility.

Maybe they communicate differently but have good intentions.

I am the only real estate investor with my bookkeeper and at first she thought this was a little overboard but once she started setting rules in Quickbooks to simplify her work she quickly realized how simple this method makes things.