The Vikings aren't trying to do things on the cheap, it's just the result of past spending that hasn't always worked out. Last year, the Colts were third in the NFL in payroll, while the Vikings were fourth, and both teams won a combined five games.
Both teams have new general managers who have replaced high-priced veterans with younger players as part of a rebuilding process, as Tom Pelissero of 1500 ESPN explained.
Whatever happens, don't expect the low cash spend this season to become a trend going forward. The Wilfs' track record shows they're willing to pay what it takes to put a winning team on the field, even if sometimes they have paid the wrong people.