I think you need to inform your mother that this new knife is just the beginning of a lifelong collection/obsession. You may be able to convince her that she needs to start paying you extra for chores, or find a way to help you start saving money to buy the next knife.
Though not on bearings, a great, first, quality knife that I got my son when he turned 14 was the Kershaw Junkyard Dog II with a composite blade. Great steel, great ergonomics, simple and smooth to operate, and built to take a beating, and survive.
If you're going to get into this hobby the right way, you will also need to find a decent sharpening system, and learn how to use it. It can be as simple as a couple of ceramic rods; medium and fine are all you should need, initially. Or get one of those little draw-through crossed-ceramic things (NOT TUNGSTEN!).
Now, again, about that job... Yes, you're going to need one. Once you start down this road, there's no turning back. Enjoy the ride!
Oh, yeah. Happy Birthday!