Of course you’ve heard of Frommer’s travel guidebook, Europe on $20 a Day. That was written in 1984 (the original was Europe on $5 a Day), and with two decades’ worth of inflation under the economy’s belt, not to mention the declining dollar, $20 won’t get you far. The same goes for the Tucson gem shows. You need more spending money these days. Our new guide, “Tucson on $50K a Day,” will help you adjust to inflation and show you what serious money could have bought you in February. It also serves as a reminder to begin saving now for the February 2006 trip to the Arizona desert.