[pfbz]

Originally Posted by Ian Comerford

As has already been mentioned, drilling a hole risks contaminating the hub grease with swarf. Probably the worst option.
Drive somewhere to get the nut welded or have a mobile welder come round to your house….already suggested above

While I agree in concept, it's just the axle stub underneath there without anything really exposed until I pull the hub. And once free, the hub will have the old bearings and races driven out, fully cleaned, new bearings installed, etc. so I don't think contamination is an issue.