Ai Lumi is a beautiful b & b in historical center of Trapani which offers en-suite bathrooms in all accommodations and wifi, to give two technical information of relevance. In addition to the rooms there are also the apartments in this historic 700th century building. The prices aren't bad either double is 90 € but it is justifiable if one thinks of the location and beauty of the building. If you want to spend less, however, I recommend a less central holiday home or b & b.
On the first floor there is also a good restaurant, with friendly and professional waiters who will be able to advise you on local dishes and local wines. Here I have tasted the Sicilian olives and a great one Nero d'Avola of Trapani.
Even after midnight the restaurant remains open also because it is located in one of the busiest streets just a few steps from Most southwestern tower in Sicily and I believe of Italy. A must then before visiting this place, a glass of wine or an aperitif before saying, I was in the tip of Sicily.