As already suggested, if your hold is more than about 200 tons it will be more than you can fill in a single play session. Therefore something like a Python is just as good as a bigger ship if you intend to return to station at the end of a session.
One odd thing I've noticed: there can be a bug where the hold is full but doesn't say it's full, because a few limpets in there have turned invisible. They become visible next time you dock. I've not reported this because I've only seen it twice and haven't been able to reproduce it at will.
One odd thing I've noticed: there can be a bug where the hold is full but doesn't say it's full, because a few limpets in there have turned invisible. They become visible next time you dock. I've not reported this because I've only seen it twice and haven't been able to reproduce it at will.