That's the big thing.
If we have, for example, a $3 million budget for Assistant Coaches, then you have to be smart about it.
You have 10 assistant coaches. So your average salary would be $300k.
With that, you can go a couple ways. One is to have the best, most experienced teachers on the field throughout your staff. To do that, you have to pay a premium for assistants and it means that you can't pay even the lower end of market rate for a P5 coordinator.
Alternately, you pay a premium for your coordinators and then you end up with only being able to pay $150k each for the 8 other assistants out of the $3M budget.
My strong preference is a bit of a hybrid of that. You hire a HC who is a guru on one side of the ball. The on-trend NFL model is that it's for offense and the HC handles your quarterbacks directly. Then, you go young and less expensive with your OC while paying a big premium for a veteran DC who would basically be an AHC with almost total authority over the defensive side. That leaves a bit more budget for paying the other assistants. After coordinator, the place to spend is on OL and Secondary plus someone who is going to be your recruiting coordinator.
Regardless of whether you can find that Riley/Kingsbury type guy to be your HC, you need to tilt the money toward the coordinators rather than the position coaches.
Say you hire Barry Odom as HC. You can save some money on DC, and skimp on positions like RB, TE, and LB.
Suddenly, your budget for OC goes from 700K to more like 950K/1M. Talent pool suddenly looks a lot deeper.