I suggest that you don't make purchases with economy in mind. These items may need replacement sooner than quality equipment.

If money is an issue, buy quality and used , instead of new and cheap.

Like others have said, the Cub is not a suitable trainer. An over powered Cub is worse. The Anniversary Cub will fly well on a .40 2 stroke, or a .50 4 stroke. Anything more changes the flying characteristics, and turns a nice flying bird into a "ho hum" sport model. Some say that throttle management can cure this, but it is seldom employed, and your model is heavier with the added weight of the too large engine.