Yes, it sounds strange, but no reason this cannot go well for both of you.
The site condition as it is now, and all the details about it, are what would be needed to estimate a job like this.
If you had done this kind of work before, then I doubt that you would be asking these questions. If the worksite is ideal for the proposed construction, then I estimate that a skilled paver installer would require approximately forty man hours labor to complete the pavers only. The other things such as utility lines, steps, lights, etc, would require more time.
If you have any aptitude for this kind of construction work, but not experience, then I think you are looking at about sixty man hours labor.
Unless you really have a good gut feeling about this, then maybe you should pass. There are many potential problems, when coordinating work with other contractors, when trying to coordinate work with customers, it can be much worse. On the other hand it can go great, and you might have a new friend and long term customer.
Last edited by MarkintheGarden; 09-16-2010 at 10:46 PM.