These are pressed on bearings. So the labor is going to be expensive.
Why do you think you need new bearings. It's really rare for them to fail...even after several hundred thousand miles.
I have replaced a noisy wheel bearing on the 4Runner, and have seen many other posts about people doing the same. I also replaced two on my old Jeep and two on my old Volvo. In my experience, wheel bearing failures are not rare.
You'll have to make a device that will bolt to the back of the wheel hub (same side the axle bolts to.); however, the device must allow the axle shaft to protrude through it allowing you to set the device in a press to press out the axle shaft.