A Big Stick would be a good 2nd plane. I think you could do an Extra or Edge, just turn the rates down way low and maybe do the first few flights on a buddy box. Many of the 3D type planes are EXTREMELY docile and very forgiving on the low rates.

But as others said, you're probably going to crash your second plane a lot. So whatever you get, get something you don't mind becoming an ugly patchwork of random repair jobs.