The question is what has broken and why. If the bearing housing has broken out of the mower deck, it could perhaps be caused by hitting a good-sized stump or pipe and keeping on driving, so the side of the blade plate was pushed so far sideways that it bent, then mangled and broke, the deck. If you didn't have that kind of collision, it would be more likely to have been a fatigue failure of the deck around the bearing housing, and that would be likely to be a result of poor design, manufacture or assembly.
Please post some pictures so we can see what we are talking about here. If the deck and bearing housing are casualties, the cost of this will be so high that missing a couple of months' mowing should be the least of your concerns.
