How to calculate a house hack property - Atlanta

Is there a way to calculate what I can afford if I’m planning to house hack? The rental property calculator is what I was going to go with and kind of adjust with that. I’m hoping to either find a multifamily and live in one unit or a single family home with a roommate. Any tips to run numbers would be super helpful. In addition, any Atlanta people with insight on neighborhoods would be awesome! I’m currently in Sandy Springs and will be working downtown. I’ve generally looking on the east side of the city (I enjoy the Decatur area) but am pretty new to the area and open for suggestions. Thanks so much!