Some of these group home offer meals, personal supplies, assisting in medications, and so forth.

Challenges?

Your parameters are very challenging. 

So here is a challenge for all who are willing lets do it.

If for instance, you're planning to stay local, then consider the demand and supply for each asset class in your local market prior to making a decision!

Looks like basic economics, supply and demand.The fact that your building is 100% occupied is great, and the fact that it stays 100% occupied with a waiting list is even better.

.- Limited Supply: Only 10 new MHC sites have been approved in the U.S. over the last two decades - see chart below.- Downcycle Outperformance: MHC is the least sensitive property type to negative changes in GDP - the average stay in in MHC is 13 years, unheard of in residential real estate - resulting in stable predicatble cash flow with an ability to consistently, yet responsible increase rents.Lastly, a quick glance at some MHC investors and proponents:Warren Buffett is a significant investor in the MHC space, favoring the sector for its stable, predictable cash flow.

I was tired of paying rent for my accounting practice and I found a vacant 4-office building with a huge parking lot (parking is a challenge in my town).

And thank you for your insight on the ARV challenge for duplexes

Learn about the school systems, future developments, market supply/demand, etc.