In case you can't find someone locally, I will ask a friend of mine if he would be interested. He is a master instrument maker and has a good bit of experience with optical alinement. Let me know how the search gos.
Laser guided leveling of landscapes...farms etc...
? would suppose that their equipment would serve to locate things in a straight line or on a perfect level. If this would help you, feel free to e-mail me and i will try and get their e-mail and phone numbers.
Having a set date might make things difficult. Are you flexible?