Shops will charge about 11.8 hours for both. add 1 for a/c and 0.8 for A.I.R. if so equipped. I was thinking of letting Midas do mine so no matter what state I end up in next I will have one nearby in case of problems. They quoted me $1400 for labor $200 for gasket set and $600 for a machine shop inspection only. That is a remanded long block from the dealer so I will just spend $350 for a top end gasket set, new fluids, new head bolts and have the heads inspected if needed by a engine shop directly to save the money which I don't have anyway.
It is time consuming and you will need a torque wrench $90 torque angle tool from snap-on. But you can have the time to do a much better and cleaner job.