Funding to buy/build on a property that already has rental income

[Jack Taylor]

I am looking into purchasing a property in FL that already has renters in units. There's additional space on the lot to build more--and I'd like to build one for myself as well as one additional rental unit. It seems like the mortgage to buy the property that already has rental income, and then to to build on it, may be tricky or confusing. Does anyone know how this type of mortgage would be structured?