There is an H20 for sale near me for $700, which seems pretty low to me. The owner has said that it is complete, but the front bulkhead is clogged,
WTF does that mean?
How tough are H20 hulls? I know weaker than an 18/16, but are they stronger than Wild Cats, and other new high performance boats?
I don't know about weaker, just like any boat (even a H16) there's no reason for it to touch the ground. The H16 is good for beaching and has a durable keel to it just because its a point. There's a lot of structure there to take impacts. Where as with a flat, or round bottom hull punctures can happen pretty easily.
Can you singlehand the boat in >15 knots if you furl the jib and are on your toes?
I have very limited experience on a H20, they're a handful in 15kts sailing two up. I have also heard of people bending rudder castings with the jib furled because the rudders are so loaded up. Also righting it in light air singlehanded would probably be pretty tough.