I have not done a deal with him, but I have met him numerous times and feel he is a man of good character.

I've read numerous guides and watched many YouTube videos, so I have a good theoretical understanding, but I'm still unsure about the best way to start investing in U.S. real estate.My plan is to begin with long-term rental properties and then eventually move into flipping and the BRRR (Buy, Rehab, Rent, Refinance, Repeat) strategy.

Search the BP for ADU appraisals to encounter numerous examples.

Look at numerous listings and see components of opex that different sellers include, and you'll start to get a better picture. also don't forget to include a reasonable vacancy number, and also include capex!

You likely don't have the net worth, proper LLC management or proper separation of personal interests to make this an effective approach. there numerous BP threads you can search to get more insights. tldr - keep under personal name and get a good umbrella plan. 

I invest in multiple markets and have strong relations with numerous realtors in each market.

With the numerous investors on this forum they have done this to, it is probably just the tip of the iceberg. 

Crew Enterprises Investors, (also known as Versity or NB Private Capital and numerous other names) I'm still interested in your stories.

We have purchased many hud properties including numerous ones where they "countered" and we did not accept the "minimum net to hud" sometimes a week to a month later they accepted the last offer we had submitted.

Further, not only did I learn numerous concepts, techniques, strategies, principles, etc that I used in my business career, but I still do so today.