/diy/ - Do It Yourself

Anyone have any idea how I would go about threading spokes onto a rear hub ebike motor? I don't want to spend the hundreds of dollars more for a set of spokes and rim if I can avoid it. I already have the speed controller/throttle/battery set up with another motor that is mounted to the frame. Pic related is what I'd be working with, more or less. I'd be upgrading from a 24v 250w motor to a 48v 500w+ motor. I'm pretty alright with electrics and soldering and all that good shit and know how to set up a parallel battery circuit just fine, but I'm near fucking useless when it comes to basic mechanical questions like this and every video I've found on the subject has the wheel either pre-threaded or they're using some specialist meme tool that costs thousands of dollars at a bike shop. Should I just take the hub and my existing rear wheel to a bike shop and get them to do it? The cost of the motor by itself is 250, shipping included, but the cost of the pre-threaded motor/rim is closer to 500 + shipping.