RE: 2nd Airplane that is Easy to Build
There are MANY threads on second planes, but universally the better ones are a 4*40 or 4*60 (4*40 would be good for all of your gear..I would assume)
or a Tiger...
both fly nicely and good to wring out....
but ... check with your instructor... maybe another trainer might be in order.... if you had problems with the first