Yeah, support staff is one of the hugest, least visible, unregulated parts of the arms race. When crazy facilities are built, the pictures end up everywhere, but few people realize just how much support staff programs like Alabama and Ohio State have. Even besides the obvious recruiting advantage of hiring a kid's family or H.S. Coach, they like to hire a bunch of former high school coaches from prime areas as support staff, which gives tremendous recruiting pipelines.
I bet if you went back and looked at the changes that Jimbo Fisher and Dabo Swinney made when taking over their respective programs, the most dramatic difference would be in the number of support staff they have than when they took over.