Throwing money at a club doesn't always work. You could spend 10million pound on a player and he be a total flop, its happened to the bigger clubs before.
On the flip side, you can spend very little and if you have the right management skills you can bring the best out of that player who would be regarded by most as a "cheap" option.
Wilder could have quite easily have come in and offloaded Coutts and Freeman (and rightly so he placed them on the transfer list based on last seasons performances, he stuck by them though and gave them a few games) and quickly realized that it wasn't the same Coutts and Freeman from last season, he then put his faith in them by carrying on playing them, and they look like new players under him, at a cost of £0 out of this seasons budget.
Imagine if Wilder went into the market and spent say 300k (which is big money in league one) and that player was a total flop.
Money is over rated in football, the championship is becoming just as lucrative as the Premier League, i think its the 7th most watched League world wide, which says a lot. Clubs have the ability to drop 10million on a player now and not worry. That'll be no different for any of the promoted clubs this season, but i hope we don't fall into the trap of spending because we feel that's the only way of success, it isn't.