See if I understand this correctly. If a sink hole eats your house or damages it to the point you cannot live in it, any homeowners insurance will cover it. You only need sinkhole insurance for cracking, minor damage or damage to the property not involving the dwelling. Do I have this right? I think I do from reading the laws in Florida but that doesn't seem to be what most people think.
If I'm correct, your exposure isn't as great if you drop it because you're still covered for catastrophy. Of course, I only think I understand this. If it was my house I'd never listen to an idiot like me,

Good luck.