The first suggestion I have is that you consider your motivation:
ORIGINAL: corsair29bd
My friend wants me to get back in to the hobby
If it is your friend and not you that wants you to get into the hobby, then fly his airplane.
If it is you that wants to get into the hobby, then I would suggest getting a computer model flight simulator, even a free one like FMS. That will knock the cobwebs off. Then get any 3-channel trainer.
The Sky Fly you found is looking like a good model at a good price. The radio range is officially only 500 feet, though. But I suspect that is conservatively estimated.
The Aerobird Challenger mentioned above has been a standby for a lot of beginners.
A couple others to consider: The Slow Stick is probably the most recommended trainer, with the Easy Star being a close second.