Hi, if by late model you mean a Gen 2, I would have thought weekly would be fine, as long as you give it a decent drive (eg at least 30 mins) to exercise all the parts and charge the battery. Particularly on the Gen 2 cars there isn't really anything to worry about if used weekly. Just do all the sensible things you would do for any car - let it warm up properly before revving/accelerating hard, use the brakes firmly from a decent speed at least once on each trip to clear surface rust from the discs, and don't do lots of 200yd trips with cold starts each time. Again, like most cars, Porsches seem to go wrong more frequently when they don't get used for months. Many people use a battery conditioner if the car is not used regularly, but I haven't yet found this to be necessary with decent weekly use. Hope that helps, and enjoy your car!