Maintenance is measured differently from one person to another (i.e. me cleaning canister filters is PIMA during weekly water changes and will always stay away from them while others love their canisters).
Low maintenance can mean a lot of things. If I'm understanding of your context (work schedule reducing the amount of time you can give to your tank), then you want to stay away from brackish water. It involves premixing the water (at your water mixing station) prior to the 50% water changes and topping off the water everyday to maintain stable SG
With freshwater tanks, you usually do not have to deal with water level and premixing (less time involved according to your context).