First get with CF and get an approved species list. Barring that get a copy of what they have/ are planting now.
Is this planting area confined to boxes? Or is it a strip?
If its boxes, make sure you are not required to provide safety grates around the tree. Who mulches? Gurantee period? Any nursery will gurantee plants for 1 year, but you still have to dig them up and replant them. How do you get paid for that time, materials, labor?
staking? who maintains it, and removes it when time? tree wrap required?
Do you plant trees as a general rule, or on occasion only?
Check into a local landscaper to sub the plantings, gurantee, worry, ect, to, it'll probably be cheaper in the long run. or even submit a bid for tree removal only, and submit landscapers bid with yours so its 2 seperate bids, and seperate liabilities.
Do not attempt to aquire these at a local nursery, even if they will offer you a 'discount'
with your tax id you can purchase them at wholesale for 1/3 the price of the 'discount' I normally order and pay about $30 each for 12-14' specimens. normally $125 at garden center, then discounted because I'm a good guy down to $75 a tree, [/sarcasm] what a deal [/sarcasm off]
hope I was of some help, or muddied the water more! I don't know you, or your experience, so if I said something you already know, no slight is intended
-Ralph