Yes, mine claims 'up to 300m' .... I was reporting real life experience. I'm sure if I put the base in an upstairs open window I would achieve 300m.

2-core bellwire will work absolutely fine. Yes, you need to know how to connect it. What comes into your house from the pole? .... often not even twisted.

My comment ('at night if necessary') surely suggested a somewhat light hearted, though perfectly feasible, solution.

Vic