converting a sfh to a triplex

[Grayson Wright]

Just purchased a large house in Dallas area. Previous owner used to rent it out as two apartments and it is classified in city as a multifamily. House is large enought to convert it into a Triplex. Currently starting the process of the conversion to a triplex. Would like to have separate electric and gas meters on each unit. I have never done this as I have only purchased SFH and rented them out. Can anyone please tell me how they have done this, and how complicated the process has been?