My gear gets used every day - and is rarely rinsed properly. Often I work 7 day stints on the boats where my suit is left hanging to dry but the rest of my gear is packed away in a box and left on board over night, although I do rinse my regulators at the end of the diving day. If your equipment doesn't dry, then the salt doesn't get enough chance to crystallize - which is what causes the damage to the materials you equipment is made of. Having said that, I use my gear every day - whereas prolonged periods of absence from the water without adequate washing may actually cause more damage than regular use.
When my gear and I are reunited back in the dive centre, it gets dunked and swished about a bit and packed away and every now and then my regs get a good long soak. I have to point out that whilst the don't get washed every day, my regs are serviced at the appropriate intervals. They have also made over 4,000 dives, counting the guide who owned them before me; my semi-dry has made over 1,000 dives but I will need to replace it soon, my BCD over 3,000 dives not to mention the loooooong hours of chlorinated pool sessions, and so although it might not be rinsed frequently, it's well looked after and in good working order.
My point is not to advocate slovenliness in cleaning - rather that it doesn't really matter if you don't give everything a good soak after every dive you make on a week long live-aboard. If you are going to be putting your equipment into storage then I recommend a very thorough cleaning and a good long soak in the tub before you do. I would also do it again before your next dive vacation - because spiders might like to live in the mouthpiece of your regulator!
Cheers
C.