Similarly, My mother-in-law went to live in assisted living homes rather than us having a guest house in the backyard of our current home where we could have hired a nurse full time to be here with her to take care of her at our home.

Any business could do this with their services and the savings would certainly justify the additional effort.But if you take advantage of the new law, wouldn't the renter do the same?

Also look at the rental laws in the areas you are considering, just so you understand what you are getting into and whether you are OK with them or not.

And agents are legally prohibited to engage after closing - at least per Wisconsin State law. 

I am an attorney in New York and New Jersey and for the past 15 years worked my way up and became an owner/partner in a multi-state law firm.

It's a big enough company to recognize it's in their best interest to stay on the right side of the law.

You might be able to have it considered as a mother in law suite.

For sure it is a huge safetly net if you can get it, but strictly applied, seems many of us would be out of business.

. - Who ever told you that only 30 days notice is required does not know CA law.  

I think it will also depends on state laws and a lot of information not present but the HOA rules and insurances are two different things.