I agree with Brandon. Cheaper to buy the trees. If you must move them I would figure 30 trees on a trailer per trip. It will take 2 plus hours turn around too get them too the other site with an experienced crew working the spade. Putting them in the ground after ward will be hard to name a price for your company on such a large volume of trees. Most companies here just double the cost of the tree but thats not applicable in this case. I would figure operating expense, labor for a day and your profit. add 20% and price the job per day. Do not gurantee plant survival.