Reuse 2019 radwagon motor wheel

[Thebenpink]

New to the forum, so please direct me if this belongs somewhere else!

I bought a heavily modded radwagon from a friend (bafang mid drive motor conversion) and it still has the original rear wheel with motor. I'm going to get a new rear wheel built to cut out the extra weight and magnet drag, but am wondering the following:

1) what would I need to build out a separate ebike using the radwagon wheel/motor? I know I need a controller, a screen, and a battery, but if I want to run it throttle only, do I need a pas sensor and wheel sensor fro speedometer? Any recommendations on a bike frame to build onto? Do Rad screens and motor controller show up second hand? What type of cabling do I need for thai build?

2) any recommendations for replacement 26" rear wheels for the radwagon? The original has 12gauge spokes. To have one built will be over $200, so if there's a good resource to buy a sturdy rear wheel for a cargo bike I'd appreciate your suggestions.

Thanks to all!

[Altema]

Your list is correct: Controller, screen, and battery, though you also need the wiring harness, and brakes with motor cutoff switches. You do not need a pedal assist sensor, just plug the connector going into the controller for it to keep it dry. A rubber vacuum cap from an auto parts store will work nicely. The speedometer function is built into the motor, so no need for a separate speedometer, and you can set your wheel size on the display.

[Thebenpink]

Thanks!
That's helpful. Do you happen to have links where to get the parts mentioned that will work with the rad motor?

Also, do I NEED brake cutoff switches, if I'm just running throttle? I have a half twist throttle on the radwagon and it's intuitive to let go of the throttle when I brake. 

Also unsure about what i need to check to make sure the radwagon wheel will fit, and the rad site doesn't list the axel width and other dimensions etc.

The bike I have has 29" wheels, but i've read about 69er mtb's and figure I could try it and then get a cheap 26" mtb if it doesn't ride well.

Still looking for a strong rear wheel for the wagon. All the disc brake compatible 26" wheels I've found have 14 gauge spokes, and I'm worried the weight I carry will be too much.