How should I build removable wings on a home build?
Planes on board of aircraft carriers have this: they need to fit all next together in a tight space, so they are made with foldable wings. This photo shows the folding mechanism:

Image source


Both sides of the split end in a full rib plate.
The two ends are connected via two large pins. The upper pin is the fold-up hinge, the lower pin is moved in-out via a hydraulic cylinder.
Aileron control is via a push-pull rod, with a connection bolt right at the wing hinge point, so that the wing part of the linkage can fold up/down. 


The vertical black rod keeps the wing up. If one would like to remove the wing completely, only the upper wing pin and the aileron push-pull connection rod would need to be disconnected.