High end customers will require Concierge services. 

If you want these types of service, then you should should look at the pay structure to see if it makes sense for all parties.3.

I am not a CPA and am not providing legal advice.

Usually the type of work has to be dealing with the real estate itself, not just providing a service that is applied to a part of the house/building. 

We now are looking to create an LLC and setup the necessary legal documents to protect both parties and layout the terms of the agreement.

One more piece of advise to help make up your mind in the "pro" column: Georgia and Florida have started looking into the legal gray area of wholesaling without a real estate license.

A DSCR ( debt service coverage ratio) loan was offered to me instead.

What you can require legally changes depending on your location. - If you make the above clear in the listing, you will immediately get fewer applicants.

I believe we are making the right choice by doing legal/fully permitted ADU's.

I've also seen it where legal counsel has had each of the spouses form their own single member LLC and those LLCs purchase the new property as tenants in common.Food for thought - You'll almost always get a better interest rate and terms buying as yourselves.