IMO the hot water outlets are not necessary. You can simply use a kettle or microwave to heat your water. For boil-water alerts using a microwave has some limitations, because it heats so fast and unevenly, but it can be done safely.

There is the initial cost, perhaps $140. Then there is installation cost and the dedicated circuit that will have to be run. The unit uses a 1300 watt electric element listed at 6A at 240 or 11A at 120v.

How much that circuit cost depends a lot on how far the panel is from the location and how hard it is to get a line to. Figure $100 or more. Even more if you don't have room or capacity in the panel. Ask the electrician about it and if you are thinking of going for it get a firm estimate in writing before you commit. A reputable contractor will be glad to have it all in writing as it clarifies issues and protects both sides.

There is also the energy costs your going to see that on your power bill, even if you don't actually use any hot water because it keeps a a small quantity of water hot all the time, 24/7. Your paying for the power to bring the water up to storage temperature, and you pay to reheat it as it cools. The unit is insulated but not insulation is perfect. If you are using air conditioning the energy lost by the unit has to be removed by the AC. So you pay twice.

Assuming the hot water unit is in a heated space the good news is that the energy lost in the heating season is energy not used by your furnace. So you don't pay more.

Personally I would skip it. Save your money. I can tell you that I see few of these units even in high end homes. And most of them I see are unplugged or turned off to save standby costs. They sound like a good idea, a convenience, but in the long run they don't get used enough to justify the cost.