As for the revenue, I would rely on a property manager to verify/weigh in on the rent amounts. 

Trust but verify every seller.

But that market has gotten so much hype and publicity as a great BRRRR city that it's dry right now and I am actively setting up market number 2 but I get to take with me the lessons I learned building market 1.It's trial and error, it's trust but verify, it's motivating the game pieces in the market: the agents, the GCs, the wholesalers. 

To address this, we agreed that I would work in the business for six months to verify the financials, which so far align with his POS system.My main issue is that at 23, I don't have strong financials to get a conventional loan at 75% LTV with a ~7% rate, and the seller's lack of financials complicates bank approval.

Their Hartford quote is also well above the price my own agent had gotten me from Hartford and at least initially appears to be identical coverage.  

The house next door is identical in structure and is also a Duplex, however, I have not verified that.

In terms of opening a bank account, most of them will ask for a local address but a lot of the online banks may not verify it. 

Only once they have verified absolutely everything do they give out the mortgage.

Engineer and architect to verify buildable and permits able to be pulled 

How do you find such information on lenders or anyone you want to verify legitimacy.