The WSU experience includes bringing in Eddie Fogler (had been an asst. at UNC). He promptly left and WSU went econo and hired a less expensive assistant as HC (Mike Cohen). Cohen took WSU basketball to depths that SIU will not see under Lowery.
It was only after WSu started spending some money on basketball that they climbed out of the cellar. The higher dollar (but proven as HC) guys took WSU from the Valley cellar to a S16, and this year to a second-place finish in the MVC.
Looking at WSU's 20-year track record INCLUDES the period when WSU was hiring assistant coaches on the cheap. Using the 20-year WSU history as justification for hiring lower dollar coaches includes the period of time when WSU was absolutely burned by using that approach.
Hiring coaches with no HC experience is rolling the dice EVERY time. Sometimes it works. Then you're hiring again in 3 - 5 years. Sometimes it doesn't. Then you're hiring again in 3 - 5 years and you're hiring to a program requiring a major rebuild.