I would recommend a high wing plane with a flatter (less dihedral) wing. This will allow you to practice more aerobatics but still have a comfortable plane to fly and land. Something like the standard Stick (Sweet, Ugly, Big, Ultra, etc) would be a good choice.
You can transfer the engine and I think the servos are standard size so you should be able to re-use those. The radio is made for the Nexstar as it has that stabilization system that most don't use anyway. You could use that but don't use the stabilization system. The plane will come with a tank, motor mount and most hardware. You would need to get some servo extensions, switch, and misc material to complete it. Figure another $60.00 or so.
If this is something you want to stay with , you should start saving for a good transmitter system where you can program different models and have extra channels, etc...
This isn't cheap but you don't have to spend a lot of money buying everything new either. Most of my equipment and planes were bought second-hand and some things were never used. That's part of the fun too for some in looking for good deals in the second-hand market.
Good luck .