Here is a small tutorial about how to make a reasonable ladder out of one sculptie.
Before you start modelling you will have to decide if you want your ladder to behave well with LOD (level of Detail) or not:

  • If you want a stable behaviour you can make 6 steps at maximum plus 2 sides of the ladder.
  • If you want good behaviour you can go up to 14 steps plus 2 sides.
  • If you dont care about LOD, you can get even more steps. I don’t know the exact theoretical numbers you can achieve…