I just finished the Camino de Invierno yesterday.
I stopped for coffee and tostada at the Cantina O Peto in Penasillas. The lady there was very nice and advised me about the ascent to Monte Faro. Unfortunately I did not ask about lodging at her place. Not sure if they offer rooms. Apologies for not being able to help.
My suggestion is that if the weather is not clear and nice, give the ascent to the Ermita a miss. I went up through the "way of the cross" in heavy rain and fog but visibility was approximately 5 metres only and there was snow on the ground. I struggled to find my way back through the Cruceiro. I did not see the provinces of Galicia from the top.