RCKen has the right idea, I want to endorse.

From my perspective, the longer you wring out that training plane, the more maneuvers you do with it, and the more practice you force yourself to do with emergency procedures (stall recovery, recovery from unusual attitudes, deadsticks, etc.) the more likely your second plane will survive those maneuvers.

One of my students used a Solo Sport and a Tower 40 trainer for the better part of 2 seasons. Before he got his first low wing plane going, he was doing inverted flight all over the place, and trying all kinds of aerobatics. I was happy to see him doing that, and I was happy to see him progress right through aerobatics and move into 3D.

I suggest you wring out that training plane until you can do everything with it and have had several emergencies with it. There's no better preparation for success with that first unstable aerobatic plane!

Best wishes,
Dave Olson