[MatchTheClown]

Bunnings > ozito brand, has a 1/2" socket head. ~$79 I think. Bargain imo.

However, with a screw especially a carby one you will more than likely round out the screw head whether its allen or phillips with a rattle gun. Getting an extenion arm on an allen key might be a good idea.

If it's a phillips head then the hammer impact driver might be the go as it forces the screw head into the screw and saves damaging it.

 

[MatchTheClown]

Your were talking about an electric drill. They might give you the torque you need but not for the budget you want.

The thing I described is an electric rattle gun. Great for all things socket tight... ie front sprocket nuts etc.