If all you want from a second plane is tail dragger experience why not just convert your trainer to a tail dragger? You'll just need to move the main wheels forward an inch or three, build in a little reinforcing for the new wheel position, remove the nosewheel and mount a tail wheel that's driven by the rudder. That will also help your build/repair skills and cost you next to nothing to learn to take-off & land a tail dragger, so you don't have as steep a learning curve when you move to a low-wing plane.