Done Camino, the exactly same variation. 3,5 months is a correct estimation (done 111 days, but started east of Krakow). If you would like to do it, let me know - could support it with know-how.

One day on the Way, I had an idea - a foundation, that would help those who would like to do it in a traditional way - starting from home, walking everyday and carrying all the equipment. Hope one day this idea will come true. We could support you then :)