They are hungry, know how to run their part of the business, and treat people with respect.

Make sure you know the value the ADU will add to the property before building the ADU. 2) the financing on an ADU is typically far worse than for initial investment property acquisition or is often not leveraged (HELOC, cash out refi, etc).

you're not really 'paying off a loan' on a property if you're using a different loan to do it. and if you use debt as a down payment on a property, and finance the rest with another loan - that's a very expensive way to buy something. and you most likely will lose money.only you can decide what's best for youlet me know if i am missing something

If there's anything I can do, please let me know!

NO lender is going to send you copy of their bank account.. they might have to prove up to a seller or the sellers agent but never send it to you right out of the gate.. and all the other things you discovered its just an off shore scammer trying to scam those that dont know what they dont know.

As for insurance, I don't know what anyone can complain about other than having to pay anything at all. $3kyr to get near half a million in coverage seems a rather fair number to me.   

I have an application for new insurance, but I don't know what best practice is for covering a multifamily brownstone in Brooklyn.

I know a few people with plenty of cash who can do the private loan for me without issue.Curious if this makes sense and if so if anyone has any good resources for getting best pricing on fourplex loan.

This gives me piece of mind knowing I'm not liable during the rental period. 

go by this Principle, most people like to work with who they know like and trust.