I’ve invested with both wellings and sunrise   Wellings invests in other peoples funds   They do the due diligence on various operators and invest in only the best ones. 

Do people require it before signing the lease?

Mostly people with minimal RE experience are adding a single ADU and they often make that choice based on cash flow without taking into account the negative equity position.  

Like @Russell Brazil said there are general things that need to be in place.One that stings a lot of people is the main entrance door.

This is another reason why I see 1M posts on hear about people wanting to transfer properties to their LLC because some guru they paid $5k told them too.

Nor does it pay well for an agent to spend a lot of time with a buyer that has an agency agreement but chooses to sit on their laurels instead of actively pursuing a purchase.Most agents who are serious about helping people do not have time to spend with lackadaisical clients or people who refuse to sign a buyer's agreement.

You'll find your ceiling where people snag your unit and are happy versus it sitting empty.  

Tons of people have the mini-consoles at home, but few have an actual arcade machine.After months of deliberation, we went with a 4-player machine from Quality Arcades with the track-ball and two light guns (ie, their top tier machine).

They will substitute in their own sense of fairness knowing people are unlikely to appeal such a small issue.

People most successful in all aspects of real estate investing and the real estate BUSINESS, gain knowledge and experience n three areas: (1) real estate principles, (2) real estate law, and (3) real estate finance.