I have found most accelerations range from $38 - $40USD depending on their size/weight/outputs/UTXO's and current fee rate
If this is what accelerating transaction would cost, I would rather use RBF enabled wallet like Blue wallet and increase fee myself and get it confirmed. I have paid max $7 fee, even during recent congestion times, and got it confirmed within a day, to pay $40 USD for accelerating transaction is insanity.