Effectively good egg is simply a P.O. box that takes a Commission out of your hard earned/saved money, in return, for purportedly providing due diligence to vet the potential projects and sponsors, on your behalf.

Unfortunately, my work phone is forwarded to my cell phone as I mainly work from home due to health issues. 

Also google their name and cell phone number.

Perhaps shadow a top producer in your office, After that stability and you have a nest egg.

At least most cell carriers will auto-block them. 

But ultimately, if you have a model you are wanting to use as: "plug in in-place rent in cell C10.  

Message me if you would like his cell number. 

But, what’s the best strategy for someone who wants to own property, but just as an “aside”; to diversify their portfolio, hedge against inflation, or build a retirement nest egg?

Free healthcare free cell phones free housing.  

Yours sounds good, but I'd be a little leery of putting all my eggs in the one basket.