I’m considering getting a 3rd controller.
Sounds a bit stupid, but with 3, I could have both joystick and touch-pad to choose for one hand.
One tester (SveViver?) has said you can use a cheap extension cable without problems.
If you need to be careful with money, it is cheaper to just get a 5m extension cable (so 10m combined length) for like $10 on Ali express or something.