I posted a series of comments in this Bigger Pockets feedhttps://www.biggerpockets.com/forums/925/topics/1164202-folsom-could-see-over-500-000-square-feet-of-new-doctor-s-offices-and-medical-clinics

If you follow that advice that means of all the mainstream strategies you're pretty limited limited to BRRRR or flips. 

this is the situations that are going to play out until this gets more mainstream.

As a Landlord who has No Smoking policy, I understand that smoking weed is apart of that but what about Medical Marijuana?

Help the claimant with an immediate need - finding medical care, etc.

I now require any animals brought onto the property for any length of time, even service and emotional support animals, to be registered with petscreening.com or otherwise verified through a third party, and if tenants or their guests are not happy with that, they can send the documentation directly to me (vaccination records for the animal and a doctor's note with medical license and clinician contact information be sent to me).

Also, in a mainstream asset class like value-added multifamily, I see no reason to take a risk on a sponsor that doesn't have full real estate cycle experience and didn't lose money.

What digging I've done has been in valuing professional services practices (same issue: owner does the "labor", has client loyalty, etc.) as well as medical practices (patients loyal to a doctor more than a physical address).  

See medical/nutrional/fitness professionals, do a biometric screen, and log everything in MyFitnessPal. 

Lets call that the :( side.2) And there is the happy side... passive income (syndications, passive partnerships ie medical/dentist offices) and passive losses (depreciation, bonus depreciation via cost segregations common in syndications).