And it found that over the long term, real estate trounced treasuries and bonds.

Biggerpockets folks will advocate for real estate as a long-term investment and I'm no different, but while you're thinking about it, I'd also recommend you consider and research treasuries through treasurydirect.gov while rates are still relatively high. 

Would you be better putting the $100k in the stock market, or in a treasury bill at 4% or do private lending at 10-12%? 

I'm also a bit afraid we may be going into a recession soon, so now buying lots of EDV (20-30yr US treasury Bonds, which will go up in value by 30% for every 1% drop in 30yr bond rate) Good luck.

@Brandon JaThere is not one but what you could track is the 10 year treasury https://www.mortgagenewsdaily.com/mortgage-rates/30yr-treasuries

Is a roughly 3% premium to Treasury's typical for a commercial/DSCR loan? 

The 10 year treasury is. 

The executive order calls only for Treasury Secretary Steven Mnuchin and Housing and Urban Development Secretary Ben Carson to see if they can find any more funds to help out.

But e-commerce has been around for several decades now and continues to grow.”In the lengthy “Marco Santarelli” YouTube videos, he explains that small business lending through promissory notes generates higher returns for investors than treasury notes, hard money lending, and real estate trust deed notes ( Link, at 29:42).

This allows you to trade stocks, mutual funds, ETFs, gain access to CD's and treasuries. 3) You can connect your IRA to what we call Wealthbridge which is a private market investing platform, enabling you to digitally invest in private opportunities.