So at what point do you have so many constraints that you "don't get to do it"? You've mentioned you need your animal, but you can't afford a one-way car renta

So at what point do you have so many constraints that you "don't get to do it"? You've mentioned you need your animal, but you can't afford a one-way car rental, or a hotel, and that flying is affordable regardless of what happens to folks with allergies. At what point is there not a workable solution in completing your travel task?