2) They're spending the money on unnecessary equipment like cameras, lenses, lightbars, a million antennas, decals and the list goes on.... If you're merely setting out to have a good enjoyable time and not out to get the best picture or best video and have no need to draw attention to yourself, you can get by without all the expensive equipment and still see just as many tornadoes as the other guy. IMO and from personal experience, a radio (standard in most cars), a map ($10) and a pair of eyes is all you really need for equipment. All that being said there is some other equipment that can "assist" in aiding your chasing success, a Laptop (most folks already have one and if not you can buy one for $300), GrLevel3 software (most weather nerds already have it and if not $70 I think) and last a GPS unit (again an application not just used for chasing $100).
Count me out of any groups that have lightbars or a million antennas on the roof Dustin! If you saw me on the road the only way you would know I'm a chaser is my license plate, but otherwise my vehicle looks totally normal. Dustin named the exact equipment I was thinking about, except for a data card or phone that will serve as a modem to access the internet. Even the data connection isn't imperative - unless you like looking for free Wifi - but the data connection is definitely a nice to have these days as the coverage gets better and better every year. There are notebooks and netbooks available for $300.00, but my tastes call for something a little more robust, since the occasional gaming session at night in the motel doesn't hurt a bit. If you buy a software application for mapping they generally come bundled with a GPS puck, so you could even punt the paper map if money is a concern. Anyhoo, not to get off topic too far, I hope you enjoy your chasecation no matter what you do!