Ferry.
The nearest ferry port is Roscoff (approx 1 hr drive to Farmhouse)
Brittany Ferries travel frequently via the Plymouth to Roscoff route. A discount code can be given allowing upto 10% off the crossing.

St.Malo is approx 1.5 hrs drive to the Farmhouse, Brittany Ferries or Condor Ferries.

The main ferry sites are: Ld lines, Brittany Ferries, Condor Ferries.

Fly.
The nearest airport is Dinard, which is approx 1.5 hrs drive to the Farmhouse, the main competitor is Ryan Air.
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Euro tunnel.
The euro tunnel takes less than 30 minutes from UK to France, with a drive time of approx 5 - 6 hrs to the farmhouse.