Duplex built as two separate condos, potential upside?

[Josh B.]

Property in every shape and form is a duplex, but is labeled as an "on-site condo" with each side being labeled as it's own entity "condo". Meaning that each unit can be sold/bought individually from each other and each is taxed separately. We figured this out after the lender dug through records and after the home was put under contract.

Currently working with a lender that will allow me to take out 2 mortgages for the entirety of the duplex. I'm able to pay lower property taxes on one side this way as I can count one of the "condos" as a primary residency.

I've never seen or heard of this before, this seems unusual to both the lender and agents especially in this area. Does anyone have experience or knowledge about this type of scenario? Is there anything I should be wary of here? How is a home like this appraised?

Thanks,