Other French Internet

Got some family who have just bought a holiday home in France. They've been asking about the best way to get internet for the house when they are there without signing up to an ongoing contract as they will only be there for 2-3 months at a time and not all year round. Anyone know of a cost effective way?

Cheers

I would read this thread @Cressi https://www.digitalworldz.co.uk/internet-uncovered-43/446845-please-advise-how-can.html#post2636278 but obviously they would need a similar French mobile deal to gifgaf unless gifgaf works in France.