If the central issue is permeability of rentals, a simple inquiry of the Selling agent or a review of the Rules and Regs should answer that question precisely and expeditiously so that you aren't waiting/wasting time and money to inspect and appraise only to find out that there is a rental cap or prohibition.

Provide him with one of the apartment units with half the rentSet out a price chart for each type of work order and then pay him monthly based on the work orders my management team receives. 

@Jay Helms lol precisely

It's the EXACT same situation once that tenant moves in, and there's nothing the bank can do, since AFAIK they don't get a say on who I accept as a tenant after I purchase the building.Your right, and that's precisely why an institution doing residential financing will not knowingly go for this scenario.Commercial loans have annual or semi-annual (or every 3 years, etc) checkups on the health of your business.This is one example of why/how vacant residential real estate often sells for more than tenant occupied. 

I just researched several rental estimators and found the following:Airbnb (yes, they have one - very limited)All The Rooms (confusing to use)Awning (good search by address/neighborhood map)Rabbu (lots of detail)Transparent (Pulls data from Airbnb, Booking.com, VRBO, and TripAdvisor)Vacasa (can use it 1-2 times before they want your email and then you're in their marketing loop)I'm putting together a chart that compares these with pros and cons.  

I am happy to share information and hope I can make it more precise and useful.1) Assumptions:- Home Price, yes this is a list price, and thanks to you I found an issue with listing updates.

I'll even include a pie chart at the bottom of the post.My portfolio is 7 buildings with 20 units total. 

It would seem plausible that some of these 5-7% ROI parks will return to the market as distressed sales in the near future, precisely because that return doesn't factor in enough risk and margin for error.

That is precisely what I wish to avoid because I've heard of it happening occasionally with self-directed IRAs when one doesn't plan properly in advance.

With tenants in common you have the ultimate freedom to chart your own course as individuals.