hey butch, here's a possible idea for a Boomer basis
what about a Air Hogs Titan conversion?
somewhat like the Wally Wing.
]you can get a titan from toys r us for $10 and it has a really nice airfoil already. some spars really stiffens it up and any cracks are easy to fix with hot glue (it's mandatory that any breaks, once repaired, must be traced with a black marker and have little stitches drawn across it, or band-aids drawn across big gouges, this gives the plane a lot of personality and would probably make beginners less timid. "battle scars", not failures. Also frankenplanes just look awesome
the wally wing just converts those old $5 4.5' wingspnan cheapo chuck gliders into pretty awesome flying wings.
a video build guide for something like this, with the inclusion of plans for building the booms off the back, would be a SERIOUS contender for the crowned king of scratchbuilt trainer/second plane (currently held by, arguably, the super easy and the EZfly)