cutting a hole isnt a big issue, so long as it doesnt piss off the land lord, you can rent the drill and cutting tool,
you can also have more than one filter in the exhaust system, one at each end, pull-push or an added in line filter, etc, it might mean adding an extra inline fan for more power...
i dont think its necessary to draw air from an outside source in most caes... but that a case by case situation, the main issue is filtering the aroma before releasing to an unsuspecting world, you can also add some sort slow release smelly blocks, like tiolet blacks in the pipe just before it exits to help disguise the smell.