For example, after running comparables, I found that a property's estimated value is $580,000.00, and they have an existing mortgage of $420,000.

Yes, I think, like a lot of topics that get passed around real estate circles (like 0 down physician loans...which I have never ever seen one actually close haha) there are these mythical products that people don't realize may only exist at one small bank in one small corner of the country and not actually be available to most.

However, the fact that it was an existing structure with utilities and plumbing running to the garage made our lives significantly easier.Existing 2nd Story Crash PadZONING AND PLANNINGWe’re located in a suburb of Boston where ADUs are allowed by-right… except if the structure is detached from the main building 🙄 which requires a “special permit”.

* no public interest/demand for such services for them to exist?

It doesn't exist.   

Martel10% down DSCR loans do not exist.

just now the bad people are trolling the smaller investors trying to get 500 to 1000 bucks out of them.. and I am sure many lose those dollars .. going after things that don't exist they just don't realize they don't exist.. 

What impediments exist that keep women from enjoying real estate and financial freedom?

She would then rent it from us as she could easily rent out her existing house which would more than cover the rent.   

I'm an experienced enough investor that I'm looking to leverage my existing capital to ratchet up my ongoing flips - similar to what @Jay Hinrichs mentioned about closing every 90-120 days.