This might give a one-time (non-scalable) boost to cash flow, offer multiple value-add options, and allow the house-hacker peace of mind, via the assumed mortgage, in long-term breakeven or positive cash flow in the event that the value-add plans end up not being executed, and/or the person has to move out, and rent by the room or STR become unavailable for some reason at a future date.

Maybe they are offering financing because no traditional lender will lend on the building. 

Anyone have a cheat sheet or checklist for covering your ADU bases?

It sounds like the reverse mortgage company is offering a path for you to buy it - which is more than they have to do.  

They're coincidentally based in Boston, too.Good luck!

National banks typically do not offer products that suite your needs here. 2.

There are a lot more things that occur as part of the contract that would be included including valuations for each parcel, specific tax consequences, proffers offered to the city etc. 

However, I thought the franchise might offer the guidance I needed. 

What are the pros and cons of each, and which offers the least restrictions, flexibility and cost savings for my intended purposes?

My goal is to be able to get on a facetime/zoom call with them and go over all my offers on properties.