I've gone ahead and ordered the tires and contacted my local shop to accept delivery. They'll also install the tires for $40/tire ($160) total. So with all said and done, I'm spending a grand total of $411.70/tire for TOYO Open Country MT 35X12.50R20.
TOYO Open Country MT 35X12.50R20LT 121Q E10 $334.98 4 $1,339.92
Freight Delivery $131.89 1 $131.89
Shipping Insurance $15.00 1 $15.00
Order Total: $1,486.81