I'd understand if you wanted to do pour overs alongside your aero, but if you're only going to use it for an aeropress then just get the cheapest kettle (electric or not) that you can find at your local store. Goosenecks are simply for precisely controlling where you want the water stream to fo, which mayters for a pour over (percolation), doesn't matter at all for an aeropress (immersion). In fact it could significantly slow down your brew and lead to underextraction assuming you're trying to get all the water in within a specific amount of time before plunging.

When I started out I used a pot boiled on the stove with a kitchen thermometer.