VOIs are great events, but do cost some $ to attend; if you can't afford it, don't go, and don't b*tch about it. Worrying about $100-$200 potential savings for an option of a non-driving non-goody-bag-getting guest doesn't amount to much when you are talking about:
1. VOI admission price: est. $800x2 = $1600
2. Travel costs: varies
3. Room costs: est. $800-$1000
If you're ability to go depends on a couple hundred bucks, look to save on the room costs. A couple of times, I stayed offsite at a budget room shared with a fellow Viper owner (other times I had my guest and paid for the onsite room), spending only around $250 instead of $800 (or would have been $500 if had the whole room, still more savings than a reduced guest price).