first home buyer with a unique property. advice needed!

hi everyone, thanks for the help in advance. i just bought a 4 bedroom 2 bath three story property in augusta GA. in the basement is a perfect place to simply put in a door and a lock blocking it off from the rest of the house and living there while i rent out the 2 top floors.

the two top floors have a kitchen, dining room, great room on the main floor and on the top level 2 bedrooms and a bath. rentometer gave me a score of $900 a month for a 2 bedroom 1 bath, but it is not factoring the 2 stories, dining room and great room. so my question is, because of two stories, the dining room and the great room how much will that allow me to increase rent by and how could i find this for myself in the future? appreciate all the help again.