Building a trainer

[Espeefan]

TB, there are a few things you never want to skimp on, in this hobby. Your radio gear, and other electronics, like batteries and the battery charger you chose. You'll always have your radio gear, battery packs, and battery charger. Models may come and go, but that equipment you'll keep (unless you get out of the hobby altogether), and you can always pull the servos and receiver out of one mode, and swap it to a new one. It's worth buying something better. The best you can reasonably afford at the time.