I'm pretty much the most obnoxious person I know. That said, I'm still not obnoxious enough to put my skaven slaves in one line file and then wheel them around the board.
Looking at the rules, you measure wheeling distances from the distance traveled by the model on the outside of a wheel. There's no definitive call-out for single file units - which makes me wonder how you actually measure their wheels since one guy can rotate around himself infinitely and he's never moving any distance.
Now, the jerkface application of this would be to make a long line of anything (slaves or night gobbos for maximum dickery), and use combinations of 90 facing changes and wheels to move across the board in one turn.
It's safe to say that such a move is entirely rules as written but also the sort of thing that makes you zero friends.
Now, I'm curious how this is ruled in less obnoxious cases. If you are moving a single file unit and need to wheel, what's the convention for it? I would think adding a phantom second model and measuring that would be one way to do it - or just make an arbitrary call that a single file unit uses a 1/4 on any wheel regardless of what that wheel distance is. If one wanted to chose the least favorable interpretation and measure a wheel from the longest side wheeling... well, then Bretonnian lances would be ponderously slow to wheel.
Anyway, I'm curious if folks have good house rules for this, or if you've had a tournament experience where someone tried some crazy wheel action.