HA! Don't think that I haven't thought about that though!
I've seen some quotes online of about $4K just for treads alone. And you'd need to have the rubber ones installed for desert use. The metal ones are meant to pierce the snow and ice to grip. You *might* get them to work in sand, but in Vegas theres just too much rocks, debris, and caliche that would just bend the treads and tear them up. Even then that's not a guarantee that the caliche won't shred the rubber treads since they're still meant for sand, mud, and tundra. Plus there're just so damn wide. It's not meant for trail riding. You'd have to either have a ranch or head down to Glamis, a public beach that allows motor vehicles, or someplace with sand dunes.
I suppose I could justify an LMC tug and tell myself that perhaps one day I'll have something really heavy that I'll need to push around. But a snow cat? I'd have to be like Hunter S. Thompson in Colorado somewhere with a ranch or somewhere in a tiny town where I need to be mobile in a blizzard, or at least have tons of vacant land to tear ass across.
BTW, here's a really nice one up on eBay right now:
http://www.ebay.com/itm/1992-LMC-180...-/201035769378