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Quote from @Devin James: @Jon K.The average return is not the same as an annualized return, as it ignores compounding.Your calculation takes compounding into account.https://www.investopedia.com/terms/a/averagereturn.asp#:~:text=Key%20Takeaways-,The%20average%20return%20is%20the%20simple%20mathematical%20average%20of%20a,return%2C%20as%20it%20ignores%20compounding.Links to the formula for ARR, which was the subject of your original post unless I misunderstood you.https://www.investopedia.com/terms/a/arr.asphttps://www.adventuresincre.com/glossary/average-rate-returnhttps://www.highradius.com/resources/Blog/accounting-rate-of...

As far as having trusted resources and vendors to help.Please let me know if you want to take a stab.At doing one up here I am loaded up with all sorts of resources. 

I'm a medical worker myself, so I think the resources and connections I have in that field would help.

A handy search bar in the upper right makes it easy to find previous discussions, blogs, podcasts, and other resources.

At 6:00 pm on the first Thursday of every month we have been sharing resources, knowledge and encouraging people to win at investing in real estate.

Biggerpockets has a lot of resources, so you're in the right place!

Start with a tiny rental or a fixer-upper, use helpful tools and resources, and tap into loans like bank loans, quick cash loans, or loans from people you know.

Some call the stock market a representation of human sentiment in real time, and I imagine the real estate market is not too different.

You'll find a wealth of information and resources within these forums.