I would only endorse a few condotels.

That endorsement doesn't ad much to the home policy at all. 

Janice,I recommend reviewing this with your insurance agent to find out:- will the existing insurance carrier cover the ADU Rental or AirBnB rental- will the policy need to be endorsed or replaced to get the coverage- will the existing policy be able to add the LLC if you set it up- will you have to replace or add a second policy to get it properly covered

After you win the bid, you sign (endorse) the checks so the banks can deposit them. 

If there are other owners in the LLC, a Form 107.9 endorsement may be needed to name the additional insured(s) on the title policy.

The easiest way to add coverage would be to have the policies endorsed to add you as an Additional Insured. 

I believe there is a an endorsement that needs to be added to cover the business use of an outbuilding.  

Thank you @Walter Key for that great endorsement.

The primary investor usually has a fully recorded assignment and note endorsement being sure to avoid fractionalizing the note.

The next challenge will be locating the original note so it can be properly endorsed by that same party to follow the Assignment chain.