I have a 3 piece slate 9' table in my basement that needs to be set up too. I have a 7' table that is set up. I got a good deal on the 9' table and jumped on it. I considered setting it up myself but I think when I decide to take down the 7' table and move things so I can play around the bigger table - I will get a mechanic to set it up for me.
First of all, the slates weigh close to 300lbs each. Way to big for me to handle. I don't have assembly plans for the table either. I suggest you leave it to the pros - assuming there are good table mechanics in your area.