Rental rates are fine for SFHs - I haven't had to drop my rates whatsoever with turnover, nor have I had a single tenant try to negotiate a lower rate. 

Most lenders that I work with give Wholesale Rates (vs retail rates when you go directly to a lender). 

Here's a bit more in detail about how rates are calculated for DSCR loans:1.

There are some great suggestions here on down payment, interest rate, servicing, and underwriting the borrower.  

On a daily basis I get questions from investors/property owners about the rental rate for their rental property.

I would recommend talking to many lenders/brokers to see which one has the most experience funding these loan types. 

We put it on the market at $3M but never got the offers we wanted, it was during the holidays and when rates were skyrocketing.

By the time you do that 4-5 times you should be able to have a paid off home or excess funds to invest in other assets.

Working with a mortgage broker that specializes in DSCR loans will help you find better rates and programs such as lower DSCR ratios such as a DSCR 1 ratio for better terms versus needing a 1.2 or 1.25 DSCR ratio (more on that below).

Hi BP community - I'm an investor with 3 SFHs in the Nashville area looking to acquire my first small multifamily property (2-4 units).I'm trying to determine the best approach for the 25% downpayment, comparing using cash that is currently sitting in a high yield savings account to funds from a HELOC on one of my properties.