Hot the get the meeting point for the check in/check out and to get the keys:

GPS 43°13'58.2"N 11°33'46.9"E;  43.232837, 11.563035

Coming from north: when you are in Florence Impruneta (A1 Exit) follow towards Siena for 60km, and from Siena take the “raccordo autostradale” (motorway) direction Perugia-Arezzo. After 25km exit from the motorway (in Serre di Rapolano) and go to Asciano. When you are in Asciano go to Via Sant’Agata, 7 (50m from tehe railways station “Asciano-Monte Oliveto Maggiore”) in  meeting point “Il Paese del Garbo”   to get the keys. Borgo Beccanella is 2km far from the village, towards Trequanda  - Casabianca.

Coming from South: when you are in Valdichiana (A1 Exit) follow direction Siena and after 20km exit from the motorway  and go to Asciano. When you are in Asciano go to Via Sant’Agata, 7 (50m from the railways station “Asciano-Monte Oliveto Maggiore”) in  meeting point “Il Paese del Garbo”   to get the keys. Borgo Beccanella is 2km far from the village.
Important: coming from South, probably you pass in front of Borgo Beccanella before arriving at Asciano, but you have to go the office in town for the check in.