I did a test with the combination of Tello + TelloFPV + gamepad + repeater = perfect flight. I conclude that this may be the cheapest combination and at the same time more enjoyable to fly.
It's in Portuguese.
Congratulations on the excellent work :)
I tested it and it worked perfectly. The TelloFPV app for Android recognized control easily, and as you said, without Octopus: It's a cheaper solution for those who own Android. I recommend.
Thanks for sharing the solution. :)