If you are going to spend the money on a taigen, buy a Tamiya Sherman and build it. Better quality, set up for IR battling by plugging in a battle system, and will run trouble free for a very very long time. For the price of it at the AAF tank museum, you cannot go wrong. Especially if it is a retirement hobby. You can enjoy the build, get used to how it all works, and then run it.
1/16th Tamiya RC Tanks