Should I diversify and generate other side business (side hustle)  or stocks?

I understand that appliances have a "predictable lifespan".

Sammy is named as the “beneficiary” of the trust.STEP 2: Sammy Seller transfers title to the trustee (no violation of the clause)STEP 3: Sammy Seller quietly assigns his interest under the trust to you (similar to a transfer of stock in a corporation).

Maybe it'll take you longer, maybe it won't...there's no real way to nail down the ROI there because every coach and every student is different so the results are not predictable. 

I predict that some syndicators who rolled the dice with high leverage floating rate debt could get into trouble.

My dad passed away a few years ago and left his assets to my mom, which currently includes 3 SFH (1 primary residence + 2 rentals) all paid off, about $1.3mil in equity and $3300/mo gross rental income + some stocks.

Hard to predict due to Covid and what's post covid gonna look like.2011-2018 they grossed 80k2020 grossed 160k2021 estimated 200k

You mean predictions and a book about 10 years ago predicting hyperinflation?

Having a somewhat sizable income, I have accumulated a fair amount of assets in the form of cash, stocks, bonds, and other physical assets.

Some invest in stocks, crypto, etc.