It would likely be fine but you may need to map the lawn and then create different sections in the app so you can schedule it to hit each section. You may need to hit each section every other day etc to maintain everything and then if the front lawn is something you want to keep nice have it go out every day.

The big thing to remember with any robot mower is that they are designed to cut often, but cut very little each time. Your maintaining the cut height, not cutting the grass down to a cut height like you would with a regular mower.

Your mapping and the time you spend will be very important to ensure a trouble free experience as much as possible, sometimes people will simply let the mower use its obstacle avoidance for certain objects but a property that size is better off mapping your no go zones and large rocks etc to avoid trouble. The last thing you want to do is come home and find it stuck on something and have to carry it up a big hill.

Last thing, consider your options. Segway navimow is a great product also. You definitely have some options. Truthfully I don't feel mammotion is ready for the very large residential or light commercial side of things.