Are there websites, that will giving me the current going rental rates for 2, 3  or 4 bedroom units in the different parts of Baltimore city Maryland?

The entire property & casualty market is a mess at the moment with carriers being unprofitable across the board and many becoming insolvent or shutting down in states where they were least profitable and/or were not allowed to take the rate increases they were asking for (rate increases have to be approved by each states dept of insurance they don't just get to jack the rates up because they want to)If you are in a REIA reach out to some of the players there and see who they recommend.

Are low rises exempt from the requirement?

On the other hand, investors who rely heavily on debt markets tend to respond swiftly to macroeconomic factors like rising interest rates, concentrating on large, management-intensive projects, and adjusting their price targets based on their evolving cost of capital and future cash flow projections.The top end of the market sees a limited number of marketed investment deals, but the sluggish transaction activity is not due to a lack of supply at the lower end.

Lots of lenders doing DSCR out there, they’ll differ in rates, communication, close times….what one person values might be different than what you value, so your overall experiences will vary.

My friend has written an app called Shuk Rental Marketplace (I'm not in the company) so landlords can get rated and rate their tenants.

30 yr fixed rate mortgage How did you add value to the deal?

Recognize the demand for multi-family units, rental prices, vacancy rates, and property values as of right now.

One has to remember that rent rates nationwide have softened.

Hard to say what rates will be doing then or before (without making wildly inaccurate predictions that will come back to haunt me), so I'd just say to ensure you know what kind of (or if a) prepayment penalty is baked into the loan.