This is the prop i showed how to make in my last tutorials, 

Since the game doesnt have much of details and prop will expand the enviroment with those now and creat more interactibilyty for the  player (braking, opening picking up) to spand items or... reveal some easter egs ;).

The system for braking i have is quite efitien, since there are areound 20 elements of the braking prop mixing the prioryty of the colisions manages to reduse performace cost, around 100 fps in editor ruring play mode and recording so i think its good ;).