Adding the ability to train units and removing that ability?

[cleeezzz]

i want a unit to be able to train another unit but i want to be able to remove this ability and add it back whenever i want. Also it is CRUCIAL that it retains the building queue. (not just some triggered CreateUnit)

 

[Rainther]

Pause,hide,replace selection to identical building? :?

 

[cleeezzz]

its not a building, and id prefer if it can still move while constructing O-o