Business loans typically won't let you purchase a property if you read the fine print.

One thing I continue to think about is how valuable 2-4 unit properties are becoming, and will continue to be, since Fannie/Freddie took the income restrictions from the 5% down conventional loan option for house hackers. 

Quote from @Ogonna Odo:  Small ones will not, they typically like cash or checks.

I am an aspiring serial house hacker based in southern New Hampshire actively searching for my second small multifamily deal in the Nashua area, but I've hit a wall with inventory being so tight in my local market.

Please fix this small issue and add this option for us!!

If they have a good interest rate it might be worth looking to see if you could assume their loan to take advantage of the lower rate.  

Also, have you looked into DSCR loans for the refinacne portion?

No occurrence is too small.

Bigger Pockets is a great place to find a real estate tax accountant.A good real estate accountant can save you thousands of dollars by leveraging entity selection and formation, tax deductions, cost segregations, bonus depreciation and tax planning.I recommend finding an accountant who specializes in real estate taxation, business taxation, financial planning and tax planning.You may want to consider working with your accountant remotely to expand your options.I would also recommend looking for a accountant willing to work with you throughout the year.

Go to small local/regional banks NOT national ones.