Refinancing Commercial Mortgage to Owner-Occupant?

[Brit Dunlop]

Is it possible (and if so, would it make sense) to refinance a commercial mortgage on a duplex to a personal mortgage that would be owner-occupied? We're planning to rent out our current personal residence (have been living here for 3+ years) and move into the upstairs unit of our duplex and 'house hack' in the next 6 months or so. 

But I'm just wondering, would it make sense to refinance to a personal owner-occupant mortgage? Or since we'd wipe it out in a couple of years anyway, not worth the hassle? I'm not even sure if this is a thing you can do. There's a ton of equity in this duplex as it was in pretty rough condition when we bought it in a great location... so part of me is wondering if the personal mortgage route would then allow us to open a HELOC or something and be able to access that equity?

Here are the details:

• It's a commercial 5/5 loan (our plan is to pay it back in 5 years or less before the next term).
• Current interest is 5.25%
• The remaining balance on the mortgage is under $60K, the appraised value at close was $110K, but our bank unofficially said it's likely closer to $130K.
• It's through a small local bank; the same one as our personal mortgage on our primary residence (which we'll rent out).

I appreciate any insight - thank you!