Here is a summary of the book.https://www.nateliason.com/notes/long-distance-real-estate-investing-david-greeneThe book also mentions the importance of having a rockstar Realtor, contractor, lender, and property manager.

What are the requirements lenders look for in this scenario?

Talking to residents power has been shut off to the park three times in the last two years while water has been shut off four times- all for non payment by the park. 

That's a giant red flag for that grocer potentially declining to renew their lease, vegan gluten free customers don't want to walk through a cloud of cigarette smoke to get to their ethically sourced non-GMO organic avocado, and obviously the "no smoking within 50 feet" sign is going to be ignored by the customers of that neighboring business, who are all a bunch of smokers.

You cannot advertise publicly on (b) deals. 

All of the benefits of an investment specific underwrite with non of the red tape of conventional loan! 

Don't rule it out, happy to put you in touch with local NYC lenders that can make the deal work based on how much cash you want to put out. 

So homes with ADUs sell for more, and the appraisals have followed pricing for four+ years now.I personally know an investment group that targets neighborhoods, mostly in the San Fernando Valley, where comps with ADUs are outperforming non-ADU comps so that they can refinance out the value created by their ADUs.

What would lenders look for in both scenarios, and what would the pros and cons of each path moving forward? 

evolve publicizes they take 10%.