The BNA airport authority over the years has tried to discourage commuters from parking in employee parking by raising rates and providing unreliable bus service. Then overnight they realized there is money to be made and began charging $900/yr. The only employees that pay out of pocket are commuters and TSA. Most Airlines cover their employees parking fee. Soon you’ll have to park another mile or 2 away somewhere down Murfreesboro Rd as BNA changes current employee parking lot for rental car parking or bachelorette party pickup area.
Best deal is princess dropoff and pickup. Some use Rideshare but prices have increased over the past few years. A few Local hotels can provide parking and shuttle service but they have jacked their prices too. Good luck, by the way employee parking was $10/mo in 1990.