Do the math.
250# hanging out back can load the front axle HOW MUCH!!!!!???.
The front end can carry the full weight of the machine, ballast, and any load out front.
Like I said, do the math, it's a simple class 1 lever/ fulcrum.
Speaking from the experience of a broken front axle casting not 20 minutes after putting on the rear ballast weight and then getting under something heavy!