We don't have a Tiger but we to have a Tandem Island (similar size) that we use for diving a lot down in Florida where the bottoms are predominantly sandy bottoms. We found out the hard way that pretty much any of the grapple type anchors (even multiple anchors) can't hold the boat even in lighter winds and have had our TI drift off on us while diving more than once. We also anchor just off shore (like at beaches) quite often and even with two grapple anchors the TI washes ashore or worse yet into other powerboats (they hate that, and get very angry at us). We now have a proper sand anchor that holds the boat sound in most any conditions. It's a 4 lbs Guardian G7 anchor that we got at West Marine (a Guardian G5 may also work, but we didn't want to take the chance). I was pretty disappointed at West Marine when they told me the anchor would only work if we had 12 ft of heavy chain rode attached to the anchor (I don't want any heavy chain on my boat). We told them we would try it first without the rode chain and see if it works, then come back if we need it. That was quite a while back and we have used it now in pretty much all conditions without any difficulty without the heavy chain. As divers we typically follow the anchor line down and the anchor is the first thing we check once we get to the bottom, and the anchor point is typically our base of operation, then we follow it back up and hold on to the line during our decompression stops, especially when there is strong current.
The anchor is pretty large, and with 150 ft of rope when just laid on the deck completely covers the tramp on the boat (huge pile of rope to get tangled) so I built a spool system to store the rope, and a swing up anchor holder made from 3/4 sq aluminum that holds the anchor up out of the way behind the boat when not in use. The anchor system is completely automatic and fully controlled from the front cockpit, just release the rope and it drops, then pull the rope to bring it back up, no muss no fuss or storage problems. We trailer our TI and that anchor and anchor system has never been removed from the boat in the last couple years, and we are out every weekend. It's only 4 lbs and not a back breaker with hauling out of the water.
That bungy loop in the lower right is to keep the anchor from swinging around when transporting on the trailer, or if I don't plan on using it that day.
Here is a pic of our anchor setup
You could possibly rig something similar on your Tiger just in front of one of your rudders with a vertical spool for the anchor line (like one of those paper towel holders you see in restaurants) to keep the anchor line tidy. We also kept one of our small grapple anchors that we store in a bag, that we put out when we anchor near the beach to keep the boat from drifting back and forth (we are usually sandwiched between other power boats at the sand bars and they frown on us bumping into them. We also use the anchor quite often to steady our entry into and out of surf zones to keep from going sideways out of control (LOL we've all done that), That's why it's on the back of the boat, but we have furlable sails, you will likely need to mount yours on the nose so you can anchor nose to the wind. The TI doesn't care if it's nose or tail to the wind.
Maybe someone else has had better luck than me with grapple or foldable anchors on bigger boats in Florida, and will share what works for them.
I've heard that the Cooper anchors also work very well, I think their plastic, and very lightweight.
Hope this gives you some ideas