This is what I bought - it came out to $103.

Radio: https://www.amazon.com/gp/aw/d/B0B3T2R65X?

Battery holder for receiver since no motor/battery/esc: https://www.amazon.com/gp/aw/d/B08NWP46CD?

Servos (4): https://www.amazon.com/gp/aw/d/B07L6FZVT1?

Control arms and horns: https://www.amazon.com/gp/aw/d/B07X7PCV38?

At this point, I’m hoping the servos work with the receiver - I’ll just rewire the plugs if not. I already have the foam board and tape. I’m hoping this will get the boy airborne :)