His zealots are already seen asking where the Count is "getting his money from", and implying that he is an "establishment deep-state plant".
But he's a bin, and it's his seventh election. You can't exactly ask questions like "where is a man pretending to be a garbage can getting the £100 filing fee from" without making yourself look incredibly silly. Everyone but the most extreme cultists can see that, even his own regular supporters.
You can't fight a bin. It's like wrestling with a pig: you just get dirty and the pig enjoys it. The real question is: is Farage's support strong enough to secure an overwhelming victory against the get-rid-of-Farage candidate without actually campaigning?