It's trip-planning season.
Self-guided is much cheaper than guided trips. It depends, though, on your travel confidence. GPS is always handy. You get to see countryside, villages, and cities at your own hiking pace.
What they generally do is to transport your luggage from destination to destination, give you a map, and make your reservations. Most of their point-to-point daily walks are 8-10 miles, but some travel companies expect you to walk or hike 15 miles/day. That's a lot for many people especially in hilly terrain.
Another point is that their mapped walks are rated in the Euroland method of mild/moderate/challenging. Their "moderate" can entail serious hill-hiking so your fitness is a factor. If they say "challenging," they really mean it.
So, a more vigorous with less luxury, and a chance to see what ordinary tourists do not.
Sometimes they provide transfers to another starting point. They usually plan for two days in cities of interest, like Pisa, for people who love old churches, museums, and cafes.
It's fun to check out what these companies have to offer:
MACS Adventure Travel has walking/hiking trips all over the world.
Hillwalk Tours: Self-Guided Hiking Tours in Ireland, Scotland, England & Spain
Hooked on Walking: Guided and Self Guided Walking, Trekking, Hiking Holiday and Tours