@Salvatore Lentini yes my goal is to continue to buy and hold properties until I am eligible for retirement in 7 years and evaluate from there.  

That being said getting as many doors under one roof just makes more sense economically and its more stable. 

I have a strong W2 income but few investments that will benefit our family when retirement happens; let's call that 10-15 years down the road. 

“We see investors moving to this very stable investment class from all other [commercial real estate] segments because of higher returns and more stability.”Single-family rentals are in demand from multifamily tenants as renters choose buildings with limited common areas, and without shared hallways and elevators, Cline said.

I am in the Pittsburgh Market and its stable as can be.

Also the initial PPP money really did help keep cash flow stable.

Now, I’m paying $28-$35/sheet.Labor is stable but workers tend to move more now so make sure your contractors have enough resources to support your scope or risk your schedule slipping.Rental/owned Equipment is a hot commodity right now.

I have a lead through someone I know of a group of retired professionals with money to lend, although they, nor myself, have any formal idea of what to do.Can you good folks share how you've set up promissory notes, or shares in an LLC, interest rates, terms, etc. on how you've set up deals like this? 

Some data supports that my parent's generation (the baby boomers) are STAYING PUT as that generation is approaching retirement age.

Interest rates are low and the are is projected to remain stable over the next 10+ years, so I feel confident in always having a good tenant to rent to.