The problem is, and here's where I really screwed up, is that now I'm told by lenders that because we have a commercial tenant banks won't refinance the property.

It wouldn't hurt to set up time to meet with agents, property managers, lenders, and others while you’re visiting your markets of interst.

Wise lenders have borrowers sign legal agreements and have them provide collateral that is worth more than the amount of the loan in case the borrower doesn't make the promised payments on the loan.

From a lender’s perspective, investors don’t necessarily “shift” away from BRRRR into other asset classes—they add them to their portfolios.

However, many DSCR lenders have a minimum loan amount of $100K, which can make it challenging for investors to secure financing for lower-priced properties. 

Did you work with any real estate professionals (agents, lenders, etc.) that you'd recommend to others?

If you're thinking a Conventional loan... did your lender say if you'll be able to pass QM with such a small loan amount?

One challenge to manage is being able to clarify for lenders on those rentals (if you have them) which amount of the premium should be paid for each rental so that they do not include the entire premium into their escrow analysis, inflating your monthly payment on that rental. 

Quote from @Jonathan Klemm: Hey @Joshua Manier - I've got a list of HELOC lenders that I can share with you. 

Go to Etsy and search for "rental property tracker," and you will find hundreds of nice spreadsheets to track 10-20 rentals, usually for under $10.Software has extremely helpful features like online payments, marketing syndication (click a button, and your property is advertised on multiple sites), electronic document review/signing, maintenance tracking, and owner reports.