without getting into the question of any particular real estate 'personality's" success, or lack thereof, I can unequivocally state that the "rules" change in each differing economy.  

@Aaron Davis My personal experience is that non section 8 tenants don't play well with section 8 tenants.Frank

If you are using a DSCR loan, your personal DTI will not matter.

Our acquisitions person is walking properties and making offers, our project manager creates the product, my partner does dispo and I go get investors.

Post a sign limiting them to 6 hours or something, and enforce it (ie, call the tow truck company whose sign you have posted) at 24 hours.For the self-help detailing products to put in the vending machine, google search "what extra things do i need to detail my car" and read some car detailing guru's list that you should quickly find (if the post has a bunch of upvotes from other car detailing gurus, that's probably a good sign).

If the ADU you're proposing is the make-or-break between this deal penciling out or not, AND if it is pivotal for your plans that it be the height that you are planning, I would personally advise you to abandon this deal. 

It was quite a production and took a week if I remember correctly.

Our products are also very diverse with over 80 investors.

I can see why the landlord wants to use their person . . . they probably want to make sure its a quality repair. 

You will need 20-25% down and a commercial loan for the rest.Most lenders will want to lend to an LLC with you personally guaranteeing the loan.Typically, each MFR would be purchased under its own LLC, for liability purposes.Each LLC would then also need its own bank accounts for collecting rents and paying expenses.