Do not store a beach cat in the water...unless you're willing to do the keelboat (read "slow") boat-job anti-foul thing.
That's how I stored my cat during a week in the beach. As you can see, no way to take it out with the mast on. I cannot launch it direct into the water, because of the sand, so doing it every day is not very fun (I should get some beach wheels...).
But the hulls are definitely not as white as before now. Is this anti-fouling thing hard or expensive to do?
By the wat, it's worth to share that the line was cutted once, I used to attach it to the bridle shackle, but on a not so calm day, the constant interaction with the bridle wire terminals ended up cutting it. Now I put a separate shakle or carabiner just to attach the line, and make a second know, just in case.