would it be posible to use zencart as a booking system or would that mean to much of modifications?

The only real problem I see so far is discount system.

Exemple: the price for a room with 2 adults is 25$ per person
if a single person is in a room: +50%
1 child under 7 years: -50%
1 child 7-14 years: -30%

The system also shouldn't allow too book 1 room for two adults and 2 kids, beacuse they must order an extra room... etc.

Could this be done? There would be araound 200 hotels in system (tourist agency).

ty, renato