what's the best way in Drupal 7 to handle many fields (> 40). I've to handle hostels content-type. D7 creates as many mysql tables as fields count, so I fear for the performances, but maybe it's not a problem.
Do I have to create entity and sub-entities or create modules to store some data in the same table (a field for equipments, a field for services, a field for activites, etc.) or other solution ?
Many thanks for your advices !